Conjugation of the verb "complain"

Conjugation of the verb complain[kəmˈpleɪn], regular     

complain not complaincomplain?
All forms Indicative Conditional Participles Infinitives

Indicative

Present Indefinite

I complain
you complain
he/she/it complains
we complain
you complain
they complain

Present Continuous

I am complaining
you are complaining
he/she/it is complaining
we are complaining
you are complaining
they are complaining

Present Perfect

I have complained
you have complained
he/she/it has complained
we have complained
you have complained
they have complained

Present Perfect Continuous

I have been complaining
you have been complaining
he/she/it has been complaining
we have been complaining
you have been complaining
they have been complaining

Past Indefinite

I complained
you complained
he/she/it complained
we complained
you complained
they complained

Past Continuous

I was complaining
you were complaining
he/she/it was complaining
we were complaining
you were complaining
they were complaining

Past Perfect

I had complained
you had complained
he/she/it had complained
we had complained
you had complained
they had complained

Past Perfect Continuous

I had been complaining
you had been complaining
he/she/it had been complaining
we had been complaining
you had been complaining
they had been complaining

Future Indefinite

I will complain
you will complain
he/she/it will complain
we will complain
you will complain
they will complain

Future Continuous

I will be complaining
you will be complaining
he/she/it will be complaining
we will be complaining
you will be complaining
they will be complaining

Future Perfect

I will have complained
you will have complained
he/she/it will have complained
we will have complained
you will have complained
they will have complained

Future Perfect Continuous

I will have been complaining
you will have been complaining
he/she/it will have been complaining
we will have been complaining
you will have been complaining
they will have been complaining

Indicative

Present Indefinite

I don't complain
you don't complain
he/she/it doesn't complain
we don't complain
you don't complain
they don't complain

Present Continuous

I am not complaining
you aren't complaining
he/she/it isn't complaining
we aren't complaining
you aren't complaining
they aren't complaining

Present Perfect

I haven't complained
you haven't complained
he/she/it hasn't complained
we haven't complained
you haven't complained
they haven't complained

Present Perfect Continuous

I haven't been complaining
you haven't been complaining
he/she/it hasn't been complaining
we haven't been complaining
you haven't been complaining
they haven't been complaining

Past Indefinite

I didn't complain
you didn't complain
he/she/it didn't complain
we didn't complain
you didn't complain
they didn't complain

Past Continuous

I wasn't complaining
you weren't complaining
he/she/it wasn't complaining
we weren't complaining
you weren't complaining
they weren't complaining

Past Perfect

I hadn't complained
you hadn't complained
he/she/it hadn't complained
we hadn't complained
you hadn't complained
they hadn't complained

Past Perfect Continuous

I hadn't been complaining
you hadn't been complaining
he/she/it hadn't been complaining
we hadn't been complaining
you hadn't been complaining
they hadn't been complaining

Future Indefinite

I shan't / won't complain
you won't complain
he/she/it won't complain
we shan't / won't complain
you won't complain
they won't complain

Future Continuous

I shan't / won't be complaining
you won't be complaining
he/she/it won't be complaining
we shan't / won't be complaining
you won't be complaining
they won't be complaining

Future Perfect

I shan't / won't have complained
you won't have complained
he/she/it won't have complained
we shan't / won't have complained
you won't have complained
they won't have complained

Future Perfect Continuous

I shan't / won't have been complaining
you won't have been complaining
he/she/it won't have been complaining
we shan't / won't have been complaining
you won't have been complaining
they won't have been complaining

Indicative

Present Indefinite

do I complain?
do you complain?
does he/she/it complain?
do we complain?
do you complain?
do they complain?

Present Continuous

am I complaining?
are you complaining?
is he/she/it complaining?
are we complaining?
are you complaining?
are they complaining?

Present Perfect

have I complained?
have you complained?
has he/she/it complained?
have we complained?
have you complained?
have they complained?

Present Perfect Continuous

have I been complaining?
have you been complaining?
has he/she/it been complaining?
have we been complaining?
have you been complaining?
have they been complaining?

Past Indefinite

did I complain?
did you complain?
did he/she/it complain?
did we complain?
did you complain?
did they complain?

Past Continuous

was I complaining?
were you complaining?
was he/she/it complaining?
were we complaining?
were you complaining?
were they complaining?

Past Perfect

had I complained?
had you complained?
had he/she/it complained?
had we complained?
had you complained?
had they complained?

Past Perfect Continuous

had I been complaining?
had you been complaining?
had he/she/it been complaining?
had we been complaining?
had you been complaining?
had they been complaining?

Future Indefinite

will I complain?
will you complain?
will he/she/it complain?
will we complain?
will you complain?
will they complain?

Future Continuous

will I be complaining?
will you be complaining?
will he/she/it be complaining?
will we be complaining?
will you be complaining?
will they be complaining?

Future Perfect

will I have complained?
will you have complained?
will he/she/it have complained?
will we have complained?
will you have complained?
will they have complained?

Future Perfect Continuous

will I have been complaining?
will you have been complaining?
will he/she/it have been complaining?
will we have been complaining?
will you have been complaining?
will they have been complaining?

Conditional

Conditional Present

I would complain
you would complain
he/she/it would complain
we would complain
you would complain
they would complain

Conditional Present Continuous

I would be complaining
you would be complaining
he/she/it would be complaining
we would be complaining
you would be complaining
they would be complaining

Conditional Perfect

I would have complained
you would have complained
he/she/it would have complained
we would have complained
you would have complained
they would have complained

Conditional Perfect Continuous

I would have been complaining
you would have been complaining
he/she/it would have been complaining
we would have been complaining
you would have been complaining
they would have been complaining

Conditional

Conditional Present

I wouldn't complain
you wouldn't complain
he/she/it wouldn't complain
we wouldn't complain
you wouldn't complain
they wouldn't complain

Conditional Present Continuous

I wouldn't be complaining
you wouldn't be complaining
he/she/it wouldn't be complaining
we wouldn't be complaining
you wouldn't be complaining
they wouldn't be complaining

Conditional Perfect

I wouldn't have complained
you wouldn't have complained
he/she/it wouldn't have complained
we wouldn't have complained
you wouldn't have complained
they wouldn't have complained

Conditional Perfect Continuous

I wouldn't have been complaining
you wouldn't have been complaining
he/she/it wouldn't have been complaining
we wouldn't have been complaining
you wouldn't have been complaining
they wouldn't have been complaining

Conditional

Conditional Present

would I complain?
would you complain?
would he/she/it complain?
would we complain?
would you complain?
would they complain?

Conditional Present Continuous

would I be complaining?
would you be complaining?
would he/she/it be complaining?
would we be complaining?
would you be complaining?
would they be complaining?

Conditional Perfect

would I have complained?
would you have complained?
would he/she/it have complained?
would we have complained?
would you have complained?
would they have complained?

Conditional Perfect Continuous

would I have been complaining?
would you have been complaining?
would he/she/it have been complaining?
would we have been complaining?
would you have been complaining?
would they have been complaining?

Participles

Present

complaining

Past

complained

Infinitives

Infinitives

to complain
to have complained
to be complaining
to have been complaining
Did you find any mistake or inaccuracy? Please write to us.

English Verb Conjugation Online

PROMT.One helps you quickly check English verb forms online. Enter a verb and instantly get a table with the base form, the 3rd person singular form, the Past Simple form, the Past Participle form, and the -ing form, as well as conjugation across all 12 tenses with examples.

What the Table Shows

The service displays English verb forms by person, number, and tense, including regular, irregular, and phrasal verbs. This is useful for studying, translation, writing, and quick grammar checks.

How to Use It

  • Enter an English verb in the search box.
  • Click Search.
  • Get a table of forms, tenses, and usage examples.

Frequently Asked Questions

Which forms does the service show?
The base form, the 3rd person singular form, the Past Simple form, the Past Participle form, and the -ing form.

Does the service show irregular verbs?
Yes. PROMT.One shows irregular English verb forms and their usage across tenses.

Can I check a phrasal verb?
Yes. The service supports phrasal verbs and shows their forms together with examples.

Try it now: enter an English verb and get a complete table of forms and tenses in PROMT.One.

PROMT.One is a fast and helpful tool for any language learner. Check the conjugation of verbs and see the table of tenses for English, German, Russian, French, Italian, Portuguese and Spanish.