English verb conjugation
COULD ENDANGER

Regular verb: endanger - endangered - endangered

Affirmation

Simple form	V-ing form
I could endanger you could endanger he could endanger we could endanger you could endanger they could endanger	I could be endangering you could be endangering he could be endangering we could be endangering you could be endangering they could be endangering
Perfect	V-ing perfect
I could have endangered you could have endangered he could have endangered we could have endangered you could have endangered they could have endangered	I could have been endangering you could have been endangering he could have been endangering we could have been endangering you could have been endangering they could have been endangering

Negation

Simple form	V-ing form
I couldn't endanger you couldn't endanger he couldn't endanger we couldn't endanger you couldn't endanger they couldn't endanger	I couldn't be endangering you couldn't be endangering he couldn't be endangering we couldn't be endangering you couldn't be endangering they couldn't be endangering
Perfect	V-ing perfect
I couldn't have endangered you couldn't have endangered he couldn't have endangered we couldn't have endangered you couldn't have endangered they couldn't have endangered	I couldn't have been endangering you couldn't have been endangering he couldn't have been endangering we couldn't have been endangering you couldn't have been endangering they couldn't have been endangering

Interrogative form

Simple form	V-ing form
could I endanger? could you endanger? could he endanger? could we endanger? could you endanger? could they endanger?	could I be endangering? could you be endangering? could he be endangering? could we be endangering? could you be endangering? could they be endangering?
Perfect	V-ing perfect
could I have endangered? could you have endangered? could he have endangered? could we have endangered? could you have endangered? could they have endangered?	could I have been endangering? could you have been endangering? could he have been endangering? could we have been endangering? could you have been endangering? could they have been endangering?

Interro-negative form

Simple form	V-ing form
couldn't I endanger? couldn't you endanger? couldn't he endanger? couldn't we endanger? couldn't you endanger? couldn't they endanger?	couldn't I be endangering? couldn't you be endangering? couldn't he be endangering? couldn't we be endangering? couldn't you be endangering? couldn't they be endangering?
Perfect	V-ing perfect
couldn't I have endangered? couldn't you have endangered? couldn't he have endangered? couldn't we have endangered? couldn't you have endangered? couldn't they have endangered?	couldn't I have been endangering? couldn't you have been endangering? couldn't he have been endangering? couldn't we have been endangering? couldn't you have been endangering? couldn't they have been endangering?