English verb conjugation
COULD PERSPIRE

Regular verb: perspire - perspired - perspired

Affirmation

Simple form	V-ing form
I could perspire you could perspire he could perspire we could perspire you could perspire they could perspire	I could be perspiring you could be perspiring he could be perspiring we could be perspiring you could be perspiring they could be perspiring
Perfect	V-ing perfect
I could have perspired you could have perspired he could have perspired we could have perspired you could have perspired they could have perspired	I could have been perspiring you could have been perspiring he could have been perspiring we could have been perspiring you could have been perspiring they could have been perspiring

Negation

Simple form	V-ing form
I couldn't perspire you couldn't perspire he couldn't perspire we couldn't perspire you couldn't perspire they couldn't perspire	I couldn't be perspiring you couldn't be perspiring he couldn't be perspiring we couldn't be perspiring you couldn't be perspiring they couldn't be perspiring
Perfect	V-ing perfect
I couldn't have perspired you couldn't have perspired he couldn't have perspired we couldn't have perspired you couldn't have perspired they couldn't have perspired	I couldn't have been perspiring you couldn't have been perspiring he couldn't have been perspiring we couldn't have been perspiring you couldn't have been perspiring they couldn't have been perspiring

Interrogative form

Simple form	V-ing form
could I perspire? could you perspire? could he perspire? could we perspire? could you perspire? could they perspire?	could I be perspiring? could you be perspiring? could he be perspiring? could we be perspiring? could you be perspiring? could they be perspiring?
Perfect	V-ing perfect
could I have perspired? could you have perspired? could he have perspired? could we have perspired? could you have perspired? could they have perspired?	could I have been perspiring? could you have been perspiring? could he have been perspiring? could we have been perspiring? could you have been perspiring? could they have been perspiring?

Interro-negative form

Simple form	V-ing form
couldn't I perspire? couldn't you perspire? couldn't he perspire? couldn't we perspire? couldn't you perspire? couldn't they perspire?	couldn't I be perspiring? couldn't you be perspiring? couldn't he be perspiring? couldn't we be perspiring? couldn't you be perspiring? couldn't they be perspiring?
Perfect	V-ing perfect
couldn't I have perspired? couldn't you have perspired? couldn't he have perspired? couldn't we have perspired? couldn't you have perspired? couldn't they have perspired?	couldn't I have been perspiring? couldn't you have been perspiring? couldn't he have been perspiring? couldn't we have been perspiring? couldn't you have been perspiring? couldn't they have been perspiring?