could slide
Irregular verb: slide - slid- slid

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could slide
you could slide
he could slide
we could slide
you could slide
they could slide 	I could be sliding
you could be sliding
he could be sliding
we could be sliding
you could be sliding
they could be sliding	I could have slid
you could have slid
he could have slid
we could have slid
you could have slid
they could have slid	I could have been sliding
you could have been sliding
he could have been sliding
we could have been sliding
you could have been sliding
they could have been sliding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't slide
you couldn't slide
he couldn't slide
we couldn't slide
you couldn't slide
they couldn't slide 	I couldn't be sliding
you couldn't be sliding
he couldn't be sliding
we couldn't be sliding
you couldn't be sliding
they couldn't be sliding	I couldn't have slid
you couldn't have slid
he couldn't have slid
we couldn't have slid
you couldn't have slid
they couldn't have slid	I couldn't have been sliding
you couldn't have been sliding
he couldn't have been sliding
we couldn't have been sliding
you couldn't have been sliding
they couldn't have been sliding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I slide?
could you slide?
could he slide?
could we slide?
could you slide?
could they slide? 	could I be sliding?
could you be sliding?
could he be sliding?
could we be sliding?
could you be sliding?
could they be sliding? 	could I have slid?
could you have slid?
could he have slid?
could we have slid?
could you have slid?
could they have slid? 	could I have been sliding?
could you have been sliding?
could he have been sliding?
could we have been sliding?
could you have been sliding?
could they have been sliding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I slide?
couldn't you slide?
couldn't he slide?
couldn't we slide?
couldn't you slide?
couldn't they slide? 	couldn't I be sliding?
couldn't you be sliding?
couldn't he be sliding?
couldn't we be sliding?
couldn't you be sliding?
couldn't they be sliding? 	couldn't I have slid?
couldn't you have slid?
couldn't he have slid?
couldn't we have slid?
couldn't you have slid?
couldn't they have slid? 	couldn't I have been sliding?
couldn't you have been sliding?
couldn't he have been sliding?
couldn't we have been sliding?
couldn't you have been sliding?
couldn't they have been sliding?