English verb conjugation
COULD PIPET

Regular verb: pipet - pipeted - pipeted

Affirmation

Simple form	V-ing form
I could pipet you could pipet she could pipet we could pipet you could pipet they could pipet	I could be pipeting you could be pipeting she could be pipeting we could be pipeting you could be pipeting they could be pipeting
Perfect	V-ing perfect
I could have pipeted you could have pipeted she could have pipeted we could have pipeted you could have pipeted they could have pipeted	I could have been pipeting you could have been pipeting she could have been pipeting we could have been pipeting you could have been pipeting they could have been pipeting

Negation

Simple form	V-ing form
I couldn't pipet you couldn't pipet she couldn't pipet we couldn't pipet you couldn't pipet they couldn't pipet	I couldn't be pipeting you couldn't be pipeting she couldn't be pipeting we couldn't be pipeting you couldn't be pipeting they couldn't be pipeting
Perfect	V-ing perfect
I couldn't have pipeted you couldn't have pipeted she couldn't have pipeted we couldn't have pipeted you couldn't have pipeted they couldn't have pipeted	I couldn't have been pipeting you couldn't have been pipeting she couldn't have been pipeting we couldn't have been pipeting you couldn't have been pipeting they couldn't have been pipeting

Interrogative form

Simple form	V-ing form
could I pipet? could you pipet? could she pipet? could we pipet? could you pipet? could they pipet?	could I be pipeting? could you be pipeting? could she be pipeting? could we be pipeting? could you be pipeting? could they be pipeting?
Perfect	V-ing perfect
could I have pipeted? could you have pipeted? could she have pipeted? could we have pipeted? could you have pipeted? could they have pipeted?	could I have been pipeting? could you have been pipeting? could she have been pipeting? could we have been pipeting? could you have been pipeting? could they have been pipeting?

Interro-negative form

Simple form	V-ing form
couldn't I pipet? couldn't you pipet? couldn't she pipet? couldn't we pipet? couldn't you pipet? couldn't they pipet?	couldn't I be pipeting? couldn't you be pipeting? couldn't she be pipeting? couldn't we be pipeting? couldn't you be pipeting? couldn't they be pipeting?
Perfect	V-ing perfect
couldn't I have pipeted? couldn't you have pipeted? couldn't she have pipeted? couldn't we have pipeted? couldn't you have pipeted? couldn't they have pipeted?	couldn't I have been pipeting? couldn't you have been pipeting? couldn't she have been pipeting? couldn't we have been pipeting? couldn't you have been pipeting? couldn't they have been pipeting?