can single
Regular verb: single - singled- singled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can single
you can single
she can single
we can single
you can single
they can single 	I can be singling
you can be singling
she can be singling
we can be singling
you can be singling
they can be singling	I can have singled
you can have singled
she can have singled
we can have singled
you can have singled
they can have singled	I can have been singling
you can have been singling
she can have been singling
we can have been singling
you can have been singling
they can have been singling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't single
you can't single
she can't single
we can't single
you can't single
they can't single 	I can't be singling
you can't be singling
she can't be singling
we can't be singling
you can't be singling
they can't be singling	I can't have singled
you can't have singled
she can't have singled
we can't have singled
you can't have singled
they can't have singled	I can't have been singling
you can't have been singling
she can't have been singling
we can't have been singling
you can't have been singling
they can't have been singling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I single?
can you single?
can she single?
can we single?
can you single?
can they single? 	can I be singling?
can you be singling?
can she be singling?
can we be singling?
can you be singling?
can they be singling? 	can I have singled?
can you have singled?
can she have singled?
can we have singled?
can you have singled?
can they have singled? 	can I have been singling?
can you have been singling?
can she have been singling?
can we have been singling?
can you have been singling?
can they have been singling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I single?
can't you single?
can't she single?
can't we single?
can't you single?
can't they single? 	can't I be singling?
can't you be singling?
can't she be singling?
can't we be singling?
can't you be singling?
can't they be singling? 	can't I have singled?
can't you have singled?
can't she have singled?
can't we have singled?
can't you have singled?
can't they have singled? 	can't I have been singling?
can't you have been singling?
can't she have been singling?
can't we have been singling?
can't you have been singling?
can't they have been singling?