Conjugation and declension of "ruin" in English
Conjugation of the verb ruin[ruɪn],
regular 
Indicative
Present Indefinite
Present Continuous
Present Perfect
Present Perfect Continuous
Past Indefinite
Past Continuous
Past Perfect
Past Perfect Continuous
Future Indefinite
Future Continuous
Future Perfect
Future Perfect Continuous
Indicative
Present Indefinite
I don't ruinyou don't ruin
he/she/it doesn't ruin
we don't ruin
you don't ruin
they don't ruin
Present Continuous
I am not ruiningyou aren't ruining
he/she/it isn't ruining
we aren't ruining
you aren't ruining
they aren't ruining
Present Perfect
I haven't ruinedyou haven't ruined
he/she/it hasn't ruined
we haven't ruined
you haven't ruined
they haven't ruined
Present Perfect Continuous
I haven't been ruiningyou haven't been ruining
he/she/it hasn't been ruining
we haven't been ruining
you haven't been ruining
they haven't been ruining
Past Indefinite
I didn't ruinyou didn't ruin
he/she/it didn't ruin
we didn't ruin
you didn't ruin
they didn't ruin
Past Continuous
I wasn't ruiningyou weren't ruining
he/she/it wasn't ruining
we weren't ruining
you weren't ruining
they weren't ruining
Past Perfect
I hadn't ruinedyou hadn't ruined
he/she/it hadn't ruined
we hadn't ruined
you hadn't ruined
they hadn't ruined
Past Perfect Continuous
I hadn't been ruiningyou hadn't been ruining
he/she/it hadn't been ruining
we hadn't been ruining
you hadn't been ruining
they hadn't been ruining
Future Indefinite
I shan't / won't ruinyou won't ruin
he/she/it won't ruin
we shan't / won't ruin
you won't ruin
they won't ruin
Future Continuous
I shan't / won't be ruiningyou won't be ruining
he/she/it won't be ruining
we shan't / won't be ruining
you won't be ruining
they won't be ruining
Future Perfect
I shan't / won't have ruinedyou won't have ruined
he/she/it won't have ruined
we shan't / won't have ruined
you won't have ruined
they won't have ruined
Future Perfect Continuous
I shan't / won't have been ruiningyou won't have been ruining
he/she/it won't have been ruining
we shan't / won't have been ruining
you won't have been ruining
they won't have been ruining
Conditional
Conditional Present
Conditional Present Continuous
Conditional Perfect
Conditional Perfect Continuous
Conditional
Conditional Present
I wouldn't ruinyou wouldn't ruin
he/she/it wouldn't ruin
we wouldn't ruin
you wouldn't ruin
they wouldn't ruin
Conditional Present Continuous
I wouldn't be ruiningyou wouldn't be ruining
he/she/it wouldn't be ruining
we wouldn't be ruining
you wouldn't be ruining
they wouldn't be ruining
Conditional Perfect
I wouldn't have ruinedyou wouldn't have ruined
he/she/it wouldn't have ruined
we wouldn't have ruined
you wouldn't have ruined
they wouldn't have ruined
Conditional Perfect Continuous
I wouldn't have been ruiningyou wouldn't have been ruining
he/she/it wouldn't have been ruining
we wouldn't have been ruining
you wouldn't have been ruining
they wouldn't have been ruining
Participles
Present
Past
Infinitives
Infinitives
Popular English Verbs
Conjugation of English verbs
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