English verb conjugation
COULD GATHER

Regular verb: gather - gathered - gathered

Affirmation

Simple form	V-ing form
I could gather you could gather he could gather we could gather you could gather they could gather	I could be gathering you could be gathering he could be gathering we could be gathering you could be gathering they could be gathering
Perfect	V-ing perfect
I could have gathered you could have gathered he could have gathered we could have gathered you could have gathered they could have gathered	I could have been gathering you could have been gathering he could have been gathering we could have been gathering you could have been gathering they could have been gathering

Negation

Simple form	V-ing form
I couldn't gather you couldn't gather he couldn't gather we couldn't gather you couldn't gather they couldn't gather	I couldn't be gathering you couldn't be gathering he couldn't be gathering we couldn't be gathering you couldn't be gathering they couldn't be gathering
Perfect	V-ing perfect
I couldn't have gathered you couldn't have gathered he couldn't have gathered we couldn't have gathered you couldn't have gathered they couldn't have gathered	I couldn't have been gathering you couldn't have been gathering he couldn't have been gathering we couldn't have been gathering you couldn't have been gathering they couldn't have been gathering

Interrogative form

Simple form	V-ing form
could I gather? could you gather? could he gather? could we gather? could you gather? could they gather?	could I be gathering? could you be gathering? could he be gathering? could we be gathering? could you be gathering? could they be gathering?
Perfect	V-ing perfect
could I have gathered? could you have gathered? could he have gathered? could we have gathered? could you have gathered? could they have gathered?	could I have been gathering? could you have been gathering? could he have been gathering? could we have been gathering? could you have been gathering? could they have been gathering?

Interro-negative form

Simple form	V-ing form
couldn't I gather? couldn't you gather? couldn't he gather? couldn't we gather? couldn't you gather? couldn't they gather?	couldn't I be gathering? couldn't you be gathering? couldn't he be gathering? couldn't we be gathering? couldn't you be gathering? couldn't they be gathering?
Perfect	V-ing perfect
couldn't I have gathered? couldn't you have gathered? couldn't he have gathered? couldn't we have gathered? couldn't you have gathered? couldn't they have gathered?	couldn't I have been gathering? couldn't you have been gathering? couldn't he have been gathering? couldn't we have been gathering? couldn't you have been gathering? couldn't they have been gathering?