can appal
Regular verb: appal - appaled- appaled

Affirmation 	
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I can appal
you can appal
he can appal
we can appal
you can appal
they can appal 	I can be appaling
you can be appaling
he can be appaling
we can be appaling
you can be appaling
they can be appaling	I can have appaled
you can have appaled
he can have appaled
we can have appaled
you can have appaled
they can have appaled	I can have been appaling
you can have been appaling
he can have been appaling
we can have been appaling
you can have been appaling
they can have been appaling	

Negation 	
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I can't appal
you can't appal
he can't appal
we can't appal
you can't appal
they can't appal 	I can't be appaling
you can't be appaling
he can't be appaling
we can't be appaling
you can't be appaling
they can't be appaling	I can't have appaled
you can't have appaled
he can't have appaled
we can't have appaled
you can't have appaled
they can't have appaled	I can't have been appaling
you can't have been appaling
he can't have been appaling
we can't have been appaling
you can't have been appaling
they can't have been appaling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I appal?
can you appal?
can he appal?
can we appal?
can you appal?
can they appal? 	can I be appaling?
can you be appaling?
can he be appaling?
can we be appaling?
can you be appaling?
can they be appaling? 	can I have appaled?
can you have appaled?
can he have appaled?
can we have appaled?
can you have appaled?
can they have appaled? 	can I have been appaling?
can you have been appaling?
can he have been appaling?
can we have been appaling?
can you have been appaling?
can they have been appaling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I appal?
can't you appal?
can't he appal?
can't we appal?
can't you appal?
can't they appal? 	can't I be appaling?
can't you be appaling?
can't he be appaling?
can't we be appaling?
can't you be appaling?
can't they be appaling? 	can't I have appaled?
can't you have appaled?
can't he have appaled?
can't we have appaled?
can't you have appaled?
can't they have appaled? 	can't I have been appaling?
can't you have been appaling?
can't he have been appaling?
can't we have been appaling?
can't you have been appaling?
can't they have been appaling?