English verb conjugation
COULD TRY

Regular verb: try - tried - tried

Affirmation

Simple form	V-ing form
I could try you could try she could try we could try you could try they could try	I could be trying you could be trying she could be trying we could be trying you could be trying they could be trying
Perfect	V-ing perfect
I could have tried you could have tried she could have tried we could have tried you could have tried they could have tried	I could have been trying you could have been trying she could have been trying we could have been trying you could have been trying they could have been trying

Negation

Simple form	V-ing form
I couldn't try you couldn't try she couldn't try we couldn't try you couldn't try they couldn't try	I couldn't be trying you couldn't be trying she couldn't be trying we couldn't be trying you couldn't be trying they couldn't be trying
Perfect	V-ing perfect
I couldn't have tried you couldn't have tried she couldn't have tried we couldn't have tried you couldn't have tried they couldn't have tried	I couldn't have been trying you couldn't have been trying she couldn't have been trying we couldn't have been trying you couldn't have been trying they couldn't have been trying

Interrogative form

Simple form	V-ing form
could I try? could you try? could she try? could we try? could you try? could they try?	could I be trying? could you be trying? could she be trying? could we be trying? could you be trying? could they be trying?
Perfect	V-ing perfect
could I have tried? could you have tried? could she have tried? could we have tried? could you have tried? could they have tried?	could I have been trying? could you have been trying? could she have been trying? could we have been trying? could you have been trying? could they have been trying?

Interro-negative form

Simple form	V-ing form
couldn't I try? couldn't you try? couldn't she try? couldn't we try? couldn't you try? couldn't they try?	couldn't I be trying? couldn't you be trying? couldn't she be trying? couldn't we be trying? couldn't you be trying? couldn't they be trying?
Perfect	V-ing perfect
couldn't I have tried? couldn't you have tried? couldn't she have tried? couldn't we have tried? couldn't you have tried? couldn't they have tried?	couldn't I have been trying? couldn't you have been trying? couldn't she have been trying? couldn't we have been trying? couldn't you have been trying? couldn't they have been trying?