English verb conjugation
COULD SEQUENCE

Regular verb: sequence - sequenced - sequenced

Affirmation

Simple form	V-ing form
I could sequence you could sequence he could sequence we could sequence you could sequence they could sequence	I could be sequencing you could be sequencing he could be sequencing we could be sequencing you could be sequencing they could be sequencing
Perfect	V-ing perfect
I could have sequenced you could have sequenced he could have sequenced we could have sequenced you could have sequenced they could have sequenced	I could have been sequencing you could have been sequencing he could have been sequencing we could have been sequencing you could have been sequencing they could have been sequencing

Negation

Simple form	V-ing form
I couldn't sequence you couldn't sequence he couldn't sequence we couldn't sequence you couldn't sequence they couldn't sequence	I couldn't be sequencing you couldn't be sequencing he couldn't be sequencing we couldn't be sequencing you couldn't be sequencing they couldn't be sequencing
Perfect	V-ing perfect
I couldn't have sequenced you couldn't have sequenced he couldn't have sequenced we couldn't have sequenced you couldn't have sequenced they couldn't have sequenced	I couldn't have been sequencing you couldn't have been sequencing he couldn't have been sequencing we couldn't have been sequencing you couldn't have been sequencing they couldn't have been sequencing

Interrogative form

Simple form	V-ing form
could I sequence? could you sequence? could he sequence? could we sequence? could you sequence? could they sequence?	could I be sequencing? could you be sequencing? could he be sequencing? could we be sequencing? could you be sequencing? could they be sequencing?
Perfect	V-ing perfect
could I have sequenced? could you have sequenced? could he have sequenced? could we have sequenced? could you have sequenced? could they have sequenced?	could I have been sequencing? could you have been sequencing? could he have been sequencing? could we have been sequencing? could you have been sequencing? could they have been sequencing?

Interro-negative form

Simple form	V-ing form
couldn't I sequence? couldn't you sequence? couldn't he sequence? couldn't we sequence? couldn't you sequence? couldn't they sequence?	couldn't I be sequencing? couldn't you be sequencing? couldn't he be sequencing? couldn't we be sequencing? couldn't you be sequencing? couldn't they be sequencing?
Perfect	V-ing perfect
couldn't I have sequenced? couldn't you have sequenced? couldn't he have sequenced? couldn't we have sequenced? couldn't you have sequenced? couldn't they have sequenced?	couldn't I have been sequencing? couldn't you have been sequencing? couldn't he have been sequencing? couldn't we have been sequencing? couldn't you have been sequencing? couldn't they have been sequencing?