can
Modal auxiliary can - could

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I cannot 
you cannot 
she cannot 
we cannot 
you cannot 
they cannot  	- 	I could not 
you could not 
she could not 
we could not 
you could not 
they could not  	- 	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
- 	- 	- 	- 	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
- 	- 	- 	- 	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
- 	- 	- 	- 	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
- 	 	- 	 	

Participle 	
Present 	Past 	 	 	
- 	-