can forestall
Regular verb: forestall - forestalled- forestalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can forestall
you can forestall
he can forestall
we can forestall
you can forestall
they can forestall 	I can be forestalling
you can be forestalling
he can be forestalling
we can be forestalling
you can be forestalling
they can be forestalling	I can have forestalled
you can have forestalled
he can have forestalled
we can have forestalled
you can have forestalled
they can have forestalled	I can have been forestalling
you can have been forestalling
he can have been forestalling
we can have been forestalling
you can have been forestalling
they can have been forestalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot forestall
you cannot forestall
he cannot forestall
we cannot forestall
you cannot forestall
they cannot forestall 	I cannot be forestalling
you cannot be forestalling
he cannot be forestalling
we cannot be forestalling
you cannot be forestalling
they cannot be forestalling	I cannot have forestalled
you cannot have forestalled
he cannot have forestalled
we cannot have forestalled
you cannot have forestalled
they cannot have forestalled	I cannot have been forestalling
you cannot have been forestalling
he cannot have been forestalling
we cannot have been forestalling
you cannot have been forestalling
they cannot have been forestalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I forestall?
can you forestall?
can he forestall?
can we forestall?
can you forestall?
can they forestall? 	can I be forestalling?
can you be forestalling?
can he be forestalling?
can we be forestalling?
can you be forestalling?
can they be forestalling? 	can I have forestalled?
can you have forestalled?
can he have forestalled?
can we have forestalled?
can you have forestalled?
can they have forestalled? 	can I have been forestalling?
can you have been forestalling?
can he have been forestalling?
can we have been forestalling?
can you have been forestalling?
can they have been forestalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not forestall?
can you not forestall?
can he not forestall?
can we not forestall?
can you not forestall?
can they not forestall? 	can I not be forestalling?
can you not be forestalling?
can he not be forestalling?
can we not be forestalling?
can you not be forestalling?
can they not be forestalling? 	can I not have forestalled?
can you not have forestalled?
can he not have forestalled?
can we not have forestalled?
can you not have forestalled?
can they not have forestalled? 	can I not have been forestalling?
can you not have been forestalling?
can he not have been forestalling?
can we not have been forestalling?
can you not have been forestalling?
can they not have been forestalling?