English verb conjugation
COULD INTERLOCK

Regular verb: interlock - interlocked - interlocked

Affirmation

Simple form	V-ing form
I could interlock you could interlock she could interlock we could interlock you could interlock they could interlock	I could be interlocking you could be interlocking she could be interlocking we could be interlocking you could be interlocking they could be interlocking
Perfect	V-ing perfect
I could have interlocked you could have interlocked she could have interlocked we could have interlocked you could have interlocked they could have interlocked	I could have been interlocking you could have been interlocking she could have been interlocking we could have been interlocking you could have been interlocking they could have been interlocking

Negation

Simple form	V-ing form
I couldn't interlock you couldn't interlock she couldn't interlock we couldn't interlock you couldn't interlock they couldn't interlock	I couldn't be interlocking you couldn't be interlocking she couldn't be interlocking we couldn't be interlocking you couldn't be interlocking they couldn't be interlocking
Perfect	V-ing perfect
I couldn't have interlocked you couldn't have interlocked she couldn't have interlocked we couldn't have interlocked you couldn't have interlocked they couldn't have interlocked	I couldn't have been interlocking you couldn't have been interlocking she couldn't have been interlocking we couldn't have been interlocking you couldn't have been interlocking they couldn't have been interlocking

Interrogative form

Simple form	V-ing form
could I interlock? could you interlock? could she interlock? could we interlock? could you interlock? could they interlock?	could I be interlocking? could you be interlocking? could she be interlocking? could we be interlocking? could you be interlocking? could they be interlocking?
Perfect	V-ing perfect
could I have interlocked? could you have interlocked? could she have interlocked? could we have interlocked? could you have interlocked? could they have interlocked?	could I have been interlocking? could you have been interlocking? could she have been interlocking? could we have been interlocking? could you have been interlocking? could they have been interlocking?

Interro-negative form

Simple form	V-ing form
couldn't I interlock? couldn't you interlock? couldn't she interlock? couldn't we interlock? couldn't you interlock? couldn't they interlock?	couldn't I be interlocking? couldn't you be interlocking? couldn't she be interlocking? couldn't we be interlocking? couldn't you be interlocking? couldn't they be interlocking?
Perfect	V-ing perfect
couldn't I have interlocked? couldn't you have interlocked? couldn't she have interlocked? couldn't we have interlocked? couldn't you have interlocked? couldn't they have interlocked?	couldn't I have been interlocking? couldn't you have been interlocking? couldn't she have been interlocking? couldn't we have been interlocking? couldn't you have been interlocking? couldn't they have been interlocking?