Conjugation and declension of "costar" in English
Conjugation of the verb costar[ˈkəuˈstɑ:],
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 costaryou don't costar
he/she/it doesn't costar
we don't costar
you don't costar
they don't costar
Present Continuous
I am not costarringyou aren't costarring
he/she/it isn't costarring
we aren't costarring
you aren't costarring
they aren't costarring
Present Perfect
I haven't costarredyou haven't costarred
he/she/it hasn't costarred
we haven't costarred
you haven't costarred
they haven't costarred
Present Perfect Continuous
I haven't been costarringyou haven't been costarring
he/she/it hasn't been costarring
we haven't been costarring
you haven't been costarring
they haven't been costarring
Past Indefinite
I didn't costaryou didn't costar
he/she/it didn't costar
we didn't costar
you didn't costar
they didn't costar
Past Continuous
I wasn't costarringyou weren't costarring
he/she/it wasn't costarring
we weren't costarring
you weren't costarring
they weren't costarring
Past Perfect
I hadn't costarredyou hadn't costarred
he/she/it hadn't costarred
we hadn't costarred
you hadn't costarred
they hadn't costarred
Past Perfect Continuous
I hadn't been costarringyou hadn't been costarring
he/she/it hadn't been costarring
we hadn't been costarring
you hadn't been costarring
they hadn't been costarring
Future Indefinite
I shan't / won't costaryou won't costar
he/she/it won't costar
we shan't / won't costar
you won't costar
they won't costar
Future Continuous
I shan't / won't be costarringyou won't be costarring
he/she/it won't be costarring
we shan't / won't be costarring
you won't be costarring
they won't be costarring
Future Perfect
I shan't / won't have costarredyou won't have costarred
he/she/it won't have costarred
we shan't / won't have costarred
you won't have costarred
they won't have costarred
Future Perfect Continuous
I shan't / won't have been costarringyou won't have been costarring
he/she/it won't have been costarring
we shan't / won't have been costarring
you won't have been costarring
they won't have been costarring
Conditional
Conditional Present
Conditional Present Continuous
Conditional Perfect
Conditional Perfect Continuous
Conditional
Conditional Present
I wouldn't costaryou wouldn't costar
he/she/it wouldn't costar
we wouldn't costar
you wouldn't costar
they wouldn't costar
Conditional Present Continuous
I wouldn't be costarringyou wouldn't be costarring
he/she/it wouldn't be costarring
we wouldn't be costarring
you wouldn't be costarring
they wouldn't be costarring
Conditional Perfect
I wouldn't have costarredyou wouldn't have costarred
he/she/it wouldn't have costarred
we wouldn't have costarred
you wouldn't have costarred
they wouldn't have costarred
Conditional Perfect Continuous
I wouldn't have been costarringyou wouldn't have been costarring
he/she/it wouldn't have been costarring
we wouldn't have been costarring
you wouldn't have been costarring
they wouldn't have been costarring
Participles
Present
Past
Infinitives
Infinitives
Popular English Verbs
Conjugation of English verbs
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