English verb conjugation
COULD SUGGEST

Regular verb: suggest - suggested - suggested

Affirmation

Simple form	V-ing form
I could suggest you could suggest he could suggest we could suggest you could suggest they could suggest	I could be suggesting you could be suggesting he could be suggesting we could be suggesting you could be suggesting they could be suggesting
Perfect	V-ing perfect
I could have suggested you could have suggested he could have suggested we could have suggested you could have suggested they could have suggested	I could have been suggesting you could have been suggesting he could have been suggesting we could have been suggesting you could have been suggesting they could have been suggesting

Negation

Simple form	V-ing form
I couldn't suggest you couldn't suggest he couldn't suggest we couldn't suggest you couldn't suggest they couldn't suggest	I couldn't be suggesting you couldn't be suggesting he couldn't be suggesting we couldn't be suggesting you couldn't be suggesting they couldn't be suggesting
Perfect	V-ing perfect
I couldn't have suggested you couldn't have suggested he couldn't have suggested we couldn't have suggested you couldn't have suggested they couldn't have suggested	I couldn't have been suggesting you couldn't have been suggesting he couldn't have been suggesting we couldn't have been suggesting you couldn't have been suggesting they couldn't have been suggesting

Interrogative form

Simple form	V-ing form
could I suggest? could you suggest? could he suggest? could we suggest? could you suggest? could they suggest?	could I be suggesting? could you be suggesting? could he be suggesting? could we be suggesting? could you be suggesting? could they be suggesting?
Perfect	V-ing perfect
could I have suggested? could you have suggested? could he have suggested? could we have suggested? could you have suggested? could they have suggested?	could I have been suggesting? could you have been suggesting? could he have been suggesting? could we have been suggesting? could you have been suggesting? could they have been suggesting?

Interro-negative form

Simple form	V-ing form
couldn't I suggest? couldn't you suggest? couldn't he suggest? couldn't we suggest? couldn't you suggest? couldn't they suggest?	couldn't I be suggesting? couldn't you be suggesting? couldn't he be suggesting? couldn't we be suggesting? couldn't you be suggesting? couldn't they be suggesting?
Perfect	V-ing perfect
couldn't I have suggested? couldn't you have suggested? couldn't he have suggested? couldn't we have suggested? couldn't you have suggested? couldn't they have suggested?	couldn't I have been suggesting? couldn't you have been suggesting? couldn't he have been suggesting? couldn't we have been suggesting? couldn't you have been suggesting? couldn't they have been suggesting?