can invest
Regular verb: invest - invested- invested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can invest
you can invest
he can invest
we can invest
you can invest
they can invest 	I can be investing
you can be investing
he can be investing
we can be investing
you can be investing
they can be investing	I can have invested
you can have invested
he can have invested
we can have invested
you can have invested
they can have invested	I can have been investing
you can have been investing
he can have been investing
we can have been investing
you can have been investing
they can have been investing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't invest
you can't invest
he can't invest
we can't invest
you can't invest
they can't invest 	I can't be investing
you can't be investing
he can't be investing
we can't be investing
you can't be investing
they can't be investing	I can't have invested
you can't have invested
he can't have invested
we can't have invested
you can't have invested
they can't have invested	I can't have been investing
you can't have been investing
he can't have been investing
we can't have been investing
you can't have been investing
they can't have been investing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I invest?
can you invest?
can he invest?
can we invest?
can you invest?
can they invest? 	can I be investing?
can you be investing?
can he be investing?
can we be investing?
can you be investing?
can they be investing? 	can I have invested?
can you have invested?
can he have invested?
can we have invested?
can you have invested?
can they have invested? 	can I have been investing?
can you have been investing?
can he have been investing?
can we have been investing?
can you have been investing?
can they have been investing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I invest?
can't you invest?
can't he invest?
can't we invest?
can't you invest?
can't they invest? 	can't I be investing?
can't you be investing?
can't he be investing?
can't we be investing?
can't you be investing?
can't they be investing? 	can't I have invested?
can't you have invested?
can't he have invested?
can't we have invested?
can't you have invested?
can't they have invested? 	can't I have been investing?
can't you have been investing?
can't he have been investing?
can't we have been investing?
can't you have been investing?
can't they have been investing?