can yeast
Regular verb: yeast - yeasted- yeasted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can yeast
you can yeast
he can yeast
we can yeast
you can yeast
they can yeast 	I can be yeasting
you can be yeasting
he can be yeasting
we can be yeasting
you can be yeasting
they can be yeasting	I can have yeasted
you can have yeasted
he can have yeasted
we can have yeasted
you can have yeasted
they can have yeasted	I can have been yeasting
you can have been yeasting
he can have been yeasting
we can have been yeasting
you can have been yeasting
they can have been yeasting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't yeast
you can't yeast
he can't yeast
we can't yeast
you can't yeast
they can't yeast 	I can't be yeasting
you can't be yeasting
he can't be yeasting
we can't be yeasting
you can't be yeasting
they can't be yeasting	I can't have yeasted
you can't have yeasted
he can't have yeasted
we can't have yeasted
you can't have yeasted
they can't have yeasted	I can't have been yeasting
you can't have been yeasting
he can't have been yeasting
we can't have been yeasting
you can't have been yeasting
they can't have been yeasting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I yeast?
can you yeast?
can he yeast?
can we yeast?
can you yeast?
can they yeast? 	can I be yeasting?
can you be yeasting?
can he be yeasting?
can we be yeasting?
can you be yeasting?
can they be yeasting? 	can I have yeasted?
can you have yeasted?
can he have yeasted?
can we have yeasted?
can you have yeasted?
can they have yeasted? 	can I have been yeasting?
can you have been yeasting?
can he have been yeasting?
can we have been yeasting?
can you have been yeasting?
can they have been yeasting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I yeast?
can't you yeast?
can't he yeast?
can't we yeast?
can't you yeast?
can't they yeast? 	can't I be yeasting?
can't you be yeasting?
can't he be yeasting?
can't we be yeasting?
can't you be yeasting?
can't they be yeasting? 	can't I have yeasted?
can't you have yeasted?
can't he have yeasted?
can't we have yeasted?
can't you have yeasted?
can't they have yeasted? 	can't I have been yeasting?
can't you have been yeasting?
can't he have been yeasting?
can't we have been yeasting?
can't you have been yeasting?
can't they have been yeasting?