can tweak
Regular verb: tweak - tweaked- tweaked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tweak
you can tweak
she can tweak
we can tweak
you can tweak
they can tweak 	I can be tweaking
you can be tweaking
she can be tweaking
we can be tweaking
you can be tweaking
they can be tweaking	I can have tweaked
you can have tweaked
she can have tweaked
we can have tweaked
you can have tweaked
they can have tweaked	I can have been tweaking
you can have been tweaking
she can have been tweaking
we can have been tweaking
you can have been tweaking
they can have been tweaking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot tweak
you cannot tweak
she cannot tweak
we cannot tweak
you cannot tweak
they cannot tweak 	I cannot be tweaking
you cannot be tweaking
she cannot be tweaking
we cannot be tweaking
you cannot be tweaking
they cannot be tweaking	I cannot have tweaked
you cannot have tweaked
she cannot have tweaked
we cannot have tweaked
you cannot have tweaked
they cannot have tweaked	I cannot have been tweaking
you cannot have been tweaking
she cannot have been tweaking
we cannot have been tweaking
you cannot have been tweaking
they cannot have been tweaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tweak?
can you tweak?
can she tweak?
can we tweak?
can you tweak?
can they tweak? 	can I be tweaking?
can you be tweaking?
can she be tweaking?
can we be tweaking?
can you be tweaking?
can they be tweaking? 	can I have tweaked?
can you have tweaked?
can she have tweaked?
can we have tweaked?
can you have tweaked?
can they have tweaked? 	can I have been tweaking?
can you have been tweaking?
can she have been tweaking?
can we have been tweaking?
can you have been tweaking?
can they have been tweaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not tweak?
can you not tweak?
can she not tweak?
can we not tweak?
can you not tweak?
can they not tweak? 	can I not be tweaking?
can you not be tweaking?
can she not be tweaking?
can we not be tweaking?
can you not be tweaking?
can they not be tweaking? 	can I not have tweaked?
can you not have tweaked?
can she not have tweaked?
can we not have tweaked?
can you not have tweaked?
can they not have tweaked? 	can I not have been tweaking?
can you not have been tweaking?
can she not have been tweaking?
can we not have been tweaking?
can you not have been tweaking?
can they not have been tweaking?