English verb conjugation
COULD TRY

Regular verb: try - tried - tried

Affirmation

Simple form	V-ing form
I could try you could try he could try we could try you could try they could try	I could be trying you could be trying he 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 he 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 he 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 he 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 he 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 he 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 he 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 he try? could we try? could you try? could they try?	could I be trying? could you be trying? could he 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 he 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 he 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 he 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 he 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 he 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 he have been trying? couldn't we have been trying? couldn't you have been trying? couldn't they have been trying?