could obtrude
Regular verb: obtrude - obtruded- obtruded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could obtrude
you could obtrude
he could obtrude
we could obtrude
you could obtrude
they could obtrude 	I could be obtruding
you could be obtruding
he could be obtruding
we could be obtruding
you could be obtruding
they could be obtruding	I could have obtruded
you could have obtruded
he could have obtruded
we could have obtruded
you could have obtruded
they could have obtruded	I could have been obtruding
you could have been obtruding
he could have been obtruding
we could have been obtruding
you could have been obtruding
they could have been obtruding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not obtrude
you could not obtrude
he could not obtrude
we could not obtrude
you could not obtrude
they could not obtrude 	I could not be obtruding
you could not be obtruding
he could not be obtruding
we could not be obtruding
you could not be obtruding
they could not be obtruding	I could not have obtruded
you could not have obtruded
he could not have obtruded
we could not have obtruded
you could not have obtruded
they could not have obtruded	I could not have been obtruding
you could not have been obtruding
he could not have been obtruding
we could not have been obtruding
you could not have been obtruding
they could not have been obtruding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I obtrude?
could you obtrude?
could he obtrude?
could we obtrude?
could you obtrude?
could they obtrude? 	could I be obtruding?
could you be obtruding?
could he be obtruding?
could we be obtruding?
could you be obtruding?
could they be obtruding? 	could I have obtruded?
could you have obtruded?
could he have obtruded?
could we have obtruded?
could you have obtruded?
could they have obtruded? 	could I have been obtruding?
could you have been obtruding?
could he have been obtruding?
could we have been obtruding?
could you have been obtruding?
could they have been obtruding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not obtrude?
could you not obtrude?
could he not obtrude?
could we not obtrude?
could you not obtrude?
could they not obtrude? 	could I not be obtruding?
could you not be obtruding?
could he not be obtruding?
could we not be obtruding?
could you not be obtruding?
could they not be obtruding? 	could I not have obtruded?
could you not have obtruded?
could he not have obtruded?
could we not have obtruded?
could you not have obtruded?
could they not have obtruded? 	could I not have been obtruding?
could you not have been obtruding?
could he not have been obtruding?
could we not have been obtruding?
could you not have been obtruding?
could they not have been obtruding?