English verb conjugation
COULD STRIDULATE

Regular verb: stridulate - stridulated - stridulated

Affirmation

Simple form	V-ing form
I could stridulate you could stridulate he could stridulate we could stridulate you could stridulate they could stridulate	I could be stridulating you could be stridulating he could be stridulating we could be stridulating you could be stridulating they could be stridulating
Perfect	V-ing perfect
I could have stridulated you could have stridulated he could have stridulated we could have stridulated you could have stridulated they could have stridulated	I could have been stridulating you could have been stridulating he could have been stridulating we could have been stridulating you could have been stridulating they could have been stridulating

Negation

Simple form	V-ing form
I couldn't stridulate you couldn't stridulate he couldn't stridulate we couldn't stridulate you couldn't stridulate they couldn't stridulate	I couldn't be stridulating you couldn't be stridulating he couldn't be stridulating we couldn't be stridulating you couldn't be stridulating they couldn't be stridulating
Perfect	V-ing perfect
I couldn't have stridulated you couldn't have stridulated he couldn't have stridulated we couldn't have stridulated you couldn't have stridulated they couldn't have stridulated	I couldn't have been stridulating you couldn't have been stridulating he couldn't have been stridulating we couldn't have been stridulating you couldn't have been stridulating they couldn't have been stridulating

Interrogative form

Simple form	V-ing form
could I stridulate? could you stridulate? could he stridulate? could we stridulate? could you stridulate? could they stridulate?	could I be stridulating? could you be stridulating? could he be stridulating? could we be stridulating? could you be stridulating? could they be stridulating?
Perfect	V-ing perfect
could I have stridulated? could you have stridulated? could he have stridulated? could we have stridulated? could you have stridulated? could they have stridulated?	could I have been stridulating? could you have been stridulating? could he have been stridulating? could we have been stridulating? could you have been stridulating? could they have been stridulating?

Interro-negative form

Simple form	V-ing form
couldn't I stridulate? couldn't you stridulate? couldn't he stridulate? couldn't we stridulate? couldn't you stridulate? couldn't they stridulate?	couldn't I be stridulating? couldn't you be stridulating? couldn't he be stridulating? couldn't we be stridulating? couldn't you be stridulating? couldn't they be stridulating?
Perfect	V-ing perfect
couldn't I have stridulated? couldn't you have stridulated? couldn't he have stridulated? couldn't we have stridulated? couldn't you have stridulated? couldn't they have stridulated?	couldn't I have been stridulating? couldn't you have been stridulating? couldn't he have been stridulating? couldn't we have been stridulating? couldn't you have been stridulating? couldn't they have been stridulating?