can peek
Regular verb: peek - peeked- peeked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can peek
you can peek
he can peek
we can peek
you can peek
they can peek 	I can be peeking
you can be peeking
he can be peeking
we can be peeking
you can be peeking
they can be peeking	I can have peeked
you can have peeked
he can have peeked
we can have peeked
you can have peeked
they can have peeked	I can have been peeking
you can have been peeking
he can have been peeking
we can have been peeking
you can have been peeking
they can have been peeking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't peek
you can't peek
he can't peek
we can't peek
you can't peek
they can't peek 	I can't be peeking
you can't be peeking
he can't be peeking
we can't be peeking
you can't be peeking
they can't be peeking	I can't have peeked
you can't have peeked
he can't have peeked
we can't have peeked
you can't have peeked
they can't have peeked	I can't have been peeking
you can't have been peeking
he can't have been peeking
we can't have been peeking
you can't have been peeking
they can't have been peeking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I peek?
can you peek?
can he peek?
can we peek?
can you peek?
can they peek? 	can I be peeking?
can you be peeking?
can he be peeking?
can we be peeking?
can you be peeking?
can they be peeking? 	can I have peeked?
can you have peeked?
can he have peeked?
can we have peeked?
can you have peeked?
can they have peeked? 	can I have been peeking?
can you have been peeking?
can he have been peeking?
can we have been peeking?
can you have been peeking?
can they have been peeking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I peek?
can't you peek?
can't he peek?
can't we peek?
can't you peek?
can't they peek? 	can't I be peeking?
can't you be peeking?
can't he be peeking?
can't we be peeking?
can't you be peeking?
can't they be peeking? 	can't I have peeked?
can't you have peeked?
can't he have peeked?
can't we have peeked?
can't you have peeked?
can't they have peeked? 	can't I have been peeking?
can't you have been peeking?
can't he have been peeking?
can't we have been peeking?
can't you have been peeking?
can't they have been peeking?