English verb conjugation
COULD COMPREHEND

Regular verb: comprehend - comprehended - comprehended

Affirmation

Simple form	V-ing form
I could comprehend you could comprehend he could comprehend we could comprehend you could comprehend they could comprehend	I could be comprehending you could be comprehending he could be comprehending we could be comprehending you could be comprehending they could be comprehending
Perfect	V-ing perfect
I could have comprehended you could have comprehended he could have comprehended we could have comprehended you could have comprehended they could have comprehended	I could have been comprehending you could have been comprehending he could have been comprehending we could have been comprehending you could have been comprehending they could have been comprehending

Negation

Simple form	V-ing form
I couldn't comprehend you couldn't comprehend he couldn't comprehend we couldn't comprehend you couldn't comprehend they couldn't comprehend	I couldn't be comprehending you couldn't be comprehending he couldn't be comprehending we couldn't be comprehending you couldn't be comprehending they couldn't be comprehending
Perfect	V-ing perfect
I couldn't have comprehended you couldn't have comprehended he couldn't have comprehended we couldn't have comprehended you couldn't have comprehended they couldn't have comprehended	I couldn't have been comprehending you couldn't have been comprehending he couldn't have been comprehending we couldn't have been comprehending you couldn't have been comprehending they couldn't have been comprehending

Interrogative form

Simple form	V-ing form
could I comprehend? could you comprehend? could he comprehend? could we comprehend? could you comprehend? could they comprehend?	could I be comprehending? could you be comprehending? could he be comprehending? could we be comprehending? could you be comprehending? could they be comprehending?
Perfect	V-ing perfect
could I have comprehended? could you have comprehended? could he have comprehended? could we have comprehended? could you have comprehended? could they have comprehended?	could I have been comprehending? could you have been comprehending? could he have been comprehending? could we have been comprehending? could you have been comprehending? could they have been comprehending?

Interro-negative form

Simple form	V-ing form
couldn't I comprehend? couldn't you comprehend? couldn't he comprehend? couldn't we comprehend? couldn't you comprehend? couldn't they comprehend?	couldn't I be comprehending? couldn't you be comprehending? couldn't he be comprehending? couldn't we be comprehending? couldn't you be comprehending? couldn't they be comprehending?
Perfect	V-ing perfect
couldn't I have comprehended? couldn't you have comprehended? couldn't he have comprehended? couldn't we have comprehended? couldn't you have comprehended? couldn't they have comprehended?	couldn't I have been comprehending? couldn't you have been comprehending? couldn't he have been comprehending? couldn't we have been comprehending? couldn't you have been comprehending? couldn't they have been comprehending?