English verb conjugation
COULD ATTEND STH

Regular verb: attend sth - attend sthed - attend sthed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could attend sth you could attend sth she could attend sth we could attend sth you could attend sth they could attend sth	I could be attend sthing you could be attend sthing she could be attend sthing we could be attend sthing you could be attend sthing they could be attend sthing
Perfect	V-ing perfect
I could have attend sthed you could have attend sthed she could have attend sthed we could have attend sthed you could have attend sthed they could have attend sthed	I could have been attend sthing you could have been attend sthing she could have been attend sthing we could have been attend sthing you could have been attend sthing they could have been attend sthing

Negation

Simple form	V-ing form
I couldn't attend sth you couldn't attend sth she couldn't attend sth we couldn't attend sth you couldn't attend sth they couldn't attend sth	I couldn't be attend sthing you couldn't be attend sthing she couldn't be attend sthing we couldn't be attend sthing you couldn't be attend sthing they couldn't be attend sthing
Perfect	V-ing perfect
I couldn't have attend sthed you couldn't have attend sthed she couldn't have attend sthed we couldn't have attend sthed you couldn't have attend sthed they couldn't have attend sthed	I couldn't have been attend sthing you couldn't have been attend sthing she couldn't have been attend sthing we couldn't have been attend sthing you couldn't have been attend sthing they couldn't have been attend sthing

Interrogative form

Simple form	V-ing form
could I attend sth? could you attend sth? could she attend sth? could we attend sth? could you attend sth? could they attend sth?	could I be attend sthing? could you be attend sthing? could she be attend sthing? could we be attend sthing? could you be attend sthing? could they be attend sthing?
Perfect	V-ing perfect
could I have attend sthed? could you have attend sthed? could she have attend sthed? could we have attend sthed? could you have attend sthed? could they have attend sthed?	could I have been attend sthing? could you have been attend sthing? could she have been attend sthing? could we have been attend sthing? could you have been attend sthing? could they have been attend sthing?

Interro-negative form

Simple form	V-ing form
couldn't I attend sth? couldn't you attend sth? couldn't she attend sth? couldn't we attend sth? couldn't you attend sth? couldn't they attend sth?	couldn't I be attend sthing? couldn't you be attend sthing? couldn't she be attend sthing? couldn't we be attend sthing? couldn't you be attend sthing? couldn't they be attend sthing?
Perfect	V-ing perfect
couldn't I have attend sthed? couldn't you have attend sthed? couldn't she have attend sthed? couldn't we have attend sthed? couldn't you have attend sthed? couldn't they have attend sthed?	couldn't I have been attend sthing? couldn't you have been attend sthing? couldn't she have been attend sthing? couldn't we have been attend sthing? couldn't you have been attend sthing? couldn't they have been attend sthing?