English verb conjugation
COULD EXPERIMENT

Regular verb: experiment - experimented - experimented

Affirmation

Simple form	V-ing form
I could experiment you could experiment she could experiment we could experiment you could experiment they could experiment	I could be experimenting you could be experimenting she could be experimenting we could be experimenting you could be experimenting they could be experimenting
Perfect	V-ing perfect
I could have experimented you could have experimented she could have experimented we could have experimented you could have experimented they could have experimented	I could have been experimenting you could have been experimenting she could have been experimenting we could have been experimenting you could have been experimenting they could have been experimenting

Negation

Simple form	V-ing form
I couldn't experiment you couldn't experiment she couldn't experiment we couldn't experiment you couldn't experiment they couldn't experiment	I couldn't be experimenting you couldn't be experimenting she couldn't be experimenting we couldn't be experimenting you couldn't be experimenting they couldn't be experimenting
Perfect	V-ing perfect
I couldn't have experimented you couldn't have experimented she couldn't have experimented we couldn't have experimented you couldn't have experimented they couldn't have experimented	I couldn't have been experimenting you couldn't have been experimenting she couldn't have been experimenting we couldn't have been experimenting you couldn't have been experimenting they couldn't have been experimenting

Interrogative form

Simple form	V-ing form
could I experiment? could you experiment? could she experiment? could we experiment? could you experiment? could they experiment?	could I be experimenting? could you be experimenting? could she be experimenting? could we be experimenting? could you be experimenting? could they be experimenting?
Perfect	V-ing perfect
could I have experimented? could you have experimented? could she have experimented? could we have experimented? could you have experimented? could they have experimented?	could I have been experimenting? could you have been experimenting? could she have been experimenting? could we have been experimenting? could you have been experimenting? could they have been experimenting?

Interro-negative form

Simple form	V-ing form
couldn't I experiment? couldn't you experiment? couldn't she experiment? couldn't we experiment? couldn't you experiment? couldn't they experiment?	couldn't I be experimenting? couldn't you be experimenting? couldn't she be experimenting? couldn't we be experimenting? couldn't you be experimenting? couldn't they be experimenting?
Perfect	V-ing perfect
couldn't I have experimented? couldn't you have experimented? couldn't she have experimented? couldn't we have experimented? couldn't you have experimented? couldn't they have experimented?	couldn't I have been experimenting? couldn't you have been experimenting? couldn't she have been experimenting? couldn't we have been experimenting? couldn't you have been experimenting? couldn't they have been experimenting?