can test
Regular verb: test - tested- tested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can test
you can test
she can test
we can test
you can test
they can test 	I can be testing
you can be testing
she can be testing
we can be testing
you can be testing
they can be testing	I can have tested
you can have tested
she can have tested
we can have tested
you can have tested
they can have tested	I can have been testing
you can have been testing
she can have been testing
we can have been testing
you can have been testing
they can have been testing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot test
you cannot test
she cannot test
we cannot test
you cannot test
they cannot test 	I cannot be testing
you cannot be testing
she cannot be testing
we cannot be testing
you cannot be testing
they cannot be testing	I cannot have tested
you cannot have tested
she cannot have tested
we cannot have tested
you cannot have tested
they cannot have tested	I cannot have been testing
you cannot have been testing
she cannot have been testing
we cannot have been testing
you cannot have been testing
they cannot have been testing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I test?
can you test?
can she test?
can we test?
can you test?
can they test? 	can I be testing?
can you be testing?
can she be testing?
can we be testing?
can you be testing?
can they be testing? 	can I have tested?
can you have tested?
can she have tested?
can we have tested?
can you have tested?
can they have tested? 	can I have been testing?
can you have been testing?
can she have been testing?
can we have been testing?
can you have been testing?
can they have been testing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not test?
can you not test?
can she not test?
can we not test?
can you not test?
can they not test? 	can I not be testing?
can you not be testing?
can she not be testing?
can we not be testing?
can you not be testing?
can they not be testing? 	can I not have tested?
can you not have tested?
can she not have tested?
can we not have tested?
can you not have tested?
can they not have tested? 	can I not have been testing?
can you not have been testing?
can she not have been testing?
can we not have been testing?
can you not have been testing?
can they not have been testing?