can strengthen
Regelmä&szlig;iges Verb: strengthen - strengthened- strengthened

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I can strengthen
you can strengthen
he can strengthen
we can strengthen
you can strengthen
they can strengthen 	I can be strengthening
you can be strengthening
he can be strengthening
we can be strengthening
you can be strengthening
they can be strengthening	I can have strengthened
you can have strengthened
he can have strengthened
we can have strengthened
you can have strengthened
they can have strengthened	I can have been strengthening
you can have been strengthening
he can have been strengthening
we can have been strengthening
you can have been strengthening
they can have been strengthening	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I cannot strengthen
you cannot strengthen
he cannot strengthen
we cannot strengthen
you cannot strengthen
they cannot strengthen 	I cannot be strengthening
you cannot be strengthening
he cannot be strengthening
we cannot be strengthening
you cannot be strengthening
they cannot be strengthening	I cannot have strengthened
you cannot have strengthened
he cannot have strengthened
we cannot have strengthened
you cannot have strengthened
they cannot have strengthened	I cannot have been strengthening
you cannot have been strengthening
he cannot have been strengthening
we cannot have been strengthening
you cannot have been strengthening
they cannot have been strengthening	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can I strengthen?
can you strengthen?
can he strengthen?
can we strengthen?
can you strengthen?
can they strengthen? 	can I be strengthening?
can you be strengthening?
can he be strengthening?
can we be strengthening?
can you be strengthening?
can they be strengthening? 	can I have strengthened?
can you have strengthened?
can he have strengthened?
can we have strengthened?
can you have strengthened?
can they have strengthened? 	can I have been strengthening?
can you have been strengthening?
can he have been strengthening?
can we have been strengthening?
can you have been strengthening?
can they have been strengthening? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can I not strengthen?
can you not strengthen?
can he not strengthen?
can we not strengthen?
can you not strengthen?
can they not strengthen? 	can I not be strengthening?
can you not be strengthening?
can he not be strengthening?
can we not be strengthening?
can you not be strengthening?
can they not be strengthening? 	can I not have strengthened?
can you not have strengthened?
can he not have strengthened?
can we not have strengthened?
can you not have strengthened?
can they not have strengthened? 	can I not have been strengthening?
can you not have been strengthening?
can he not have been strengthening?
can we not have been strengthening?
can you not have been strengthening?
can they not have been strengthening?