can collect
Regular verb: collect - collected- collected

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can collect
you can collect
she can collect
we can collect
you can collect
they can collect 	I can be collecting
you can be collecting
she can be collecting
we can be collecting
you can be collecting
they can be collecting	I can have collected
you can have collected
she can have collected
we can have collected
you can have collected
they can have collected	I can have been collecting
you can have been collecting
she can have been collecting
we can have been collecting
you can have been collecting
they can have been collecting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't collect
you can't collect
she can't collect
we can't collect
you can't collect
they can't collect 	I can't be collecting
you can't be collecting
she can't be collecting
we can't be collecting
you can't be collecting
they can't be collecting	I can't have collected
you can't have collected
she can't have collected
we can't have collected
you can't have collected
they can't have collected	I can't have been collecting
you can't have been collecting
she can't have been collecting
we can't have been collecting
you can't have been collecting
they can't have been collecting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I collect?
can you collect?
can she collect?
can we collect?
can you collect?
can they collect? 	can I be collecting?
can you be collecting?
can she be collecting?
can we be collecting?
can you be collecting?
can they be collecting? 	can I have collected?
can you have collected?
can she have collected?
can we have collected?
can you have collected?
can they have collected? 	can I have been collecting?
can you have been collecting?
can she have been collecting?
can we have been collecting?
can you have been collecting?
can they have been collecting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I collect?
can't you collect?
can't she collect?
can't we collect?
can't you collect?
can't they collect? 	can't I be collecting?
can't you be collecting?
can't she be collecting?
can't we be collecting?
can't you be collecting?
can't they be collecting? 	can't I have collected?
can't you have collected?
can't she have collected?
can't we have collected?
can't you have collected?
can't they have collected? 	can't I have been collecting?
can't you have been collecting?
can't she have been collecting?
can't we have been collecting?
can't you have been collecting?
can't they have been collecting?