English verb conjugation
COULD OVERTIRE

Regular verb: overtire - overtired - overtired

Affirmation

Simple form	V-ing form
I could overtire you could overtire she could overtire we could overtire you could overtire they could overtire	I could be overtiring you could be overtiring she could be overtiring we could be overtiring you could be overtiring they could be overtiring
Perfect	V-ing perfect
I could have overtired you could have overtired she could have overtired we could have overtired you could have overtired they could have overtired	I could have been overtiring you could have been overtiring she could have been overtiring we could have been overtiring you could have been overtiring they could have been overtiring

Negation

Simple form	V-ing form
I couldn't overtire you couldn't overtire she couldn't overtire we couldn't overtire you couldn't overtire they couldn't overtire	I couldn't be overtiring you couldn't be overtiring she couldn't be overtiring we couldn't be overtiring you couldn't be overtiring they couldn't be overtiring
Perfect	V-ing perfect
I couldn't have overtired you couldn't have overtired she couldn't have overtired we couldn't have overtired you couldn't have overtired they couldn't have overtired	I couldn't have been overtiring you couldn't have been overtiring she couldn't have been overtiring we couldn't have been overtiring you couldn't have been overtiring they couldn't have been overtiring

Interrogative form

Simple form	V-ing form
could I overtire? could you overtire? could she overtire? could we overtire? could you overtire? could they overtire?	could I be overtiring? could you be overtiring? could she be overtiring? could we be overtiring? could you be overtiring? could they be overtiring?
Perfect	V-ing perfect
could I have overtired? could you have overtired? could she have overtired? could we have overtired? could you have overtired? could they have overtired?	could I have been overtiring? could you have been overtiring? could she have been overtiring? could we have been overtiring? could you have been overtiring? could they have been overtiring?

Interro-negative form

Simple form	V-ing form
couldn't I overtire? couldn't you overtire? couldn't she overtire? couldn't we overtire? couldn't you overtire? couldn't they overtire?	couldn't I be overtiring? couldn't you be overtiring? couldn't she be overtiring? couldn't we be overtiring? couldn't you be overtiring? couldn't they be overtiring?
Perfect	V-ing perfect
couldn't I have overtired? couldn't you have overtired? couldn't she have overtired? couldn't we have overtired? couldn't you have overtired? couldn't they have overtired?	couldn't I have been overtiring? couldn't you have been overtiring? couldn't she have been overtiring? couldn't we have been overtiring? couldn't you have been overtiring? couldn't they have been overtiring?