could crash
Verbo regular: crash - crashed- crashed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could crash
you could crash
she could crash
we could crash
you could crash
they could crash 	I could be crashing
you could be crashing
she could be crashing
we could be crashing
you could be crashing
they could be crashing	I could have crashed
you could have crashed
she could have crashed
we could have crashed
you could have crashed
they could have crashed	I could have been crashing
you could have been crashing
she could have been crashing
we could have been crashing
you could have been crashing
they could have been crashing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't crash
you couldn't crash
she couldn't crash
we couldn't crash
you couldn't crash
they couldn't crash 	I couldn't be crashing
you couldn't be crashing
she couldn't be crashing
we couldn't be crashing
you couldn't be crashing
they couldn't be crashing	I couldn't have crashed
you couldn't have crashed
she couldn't have crashed
we couldn't have crashed
you couldn't have crashed
they couldn't have crashed	I couldn't have been crashing
you couldn't have been crashing
she couldn't have been crashing
we couldn't have been crashing
you couldn't have been crashing
they couldn't have been crashing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I crash?
could you crash?
could she crash?
could we crash?
could you crash?
could they crash? 	could I be crashing?
could you be crashing?
could she be crashing?
could we be crashing?
could you be crashing?
could they be crashing? 	could I have crashed?
could you have crashed?
could she have crashed?
could we have crashed?
could you have crashed?
could they have crashed? 	could I have been crashing?
could you have been crashing?
could she have been crashing?
could we have been crashing?
could you have been crashing?
could they have been crashing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I crash?
couldn't you crash?
couldn't she crash?
couldn't we crash?
couldn't you crash?
couldn't they crash? 	couldn't I be crashing?
couldn't you be crashing?
couldn't she be crashing?
couldn't we be crashing?
couldn't you be crashing?
couldn't they be crashing? 	couldn't I have crashed?
couldn't you have crashed?
couldn't she have crashed?
couldn't we have crashed?
couldn't you have crashed?
couldn't they have crashed? 	couldn't I have been crashing?
couldn't you have been crashing?
couldn't she have been crashing?
couldn't we have been crashing?
couldn't you have been crashing?
couldn't they have been crashing?