can yellow
Regular verb: yellow - yellowed- yellowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can yellow
you can yellow
she can yellow
we can yellow
you can yellow
they can yellow 	I can be yellowing
you can be yellowing
she can be yellowing
we can be yellowing
you can be yellowing
they can be yellowing	I can have yellowed
you can have yellowed
she can have yellowed
we can have yellowed
you can have yellowed
they can have yellowed	I can have been yellowing
you can have been yellowing
she can have been yellowing
we can have been yellowing
you can have been yellowing
they can have been yellowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't yellow
you can't yellow
she can't yellow
we can't yellow
you can't yellow
they can't yellow 	I can't be yellowing
you can't be yellowing
she can't be yellowing
we can't be yellowing
you can't be yellowing
they can't be yellowing	I can't have yellowed
you can't have yellowed
she can't have yellowed
we can't have yellowed
you can't have yellowed
they can't have yellowed	I can't have been yellowing
you can't have been yellowing
she can't have been yellowing
we can't have been yellowing
you can't have been yellowing
they can't have been yellowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I yellow?
can you yellow?
can she yellow?
can we yellow?
can you yellow?
can they yellow? 	can I be yellowing?
can you be yellowing?
can she be yellowing?
can we be yellowing?
can you be yellowing?
can they be yellowing? 	can I have yellowed?
can you have yellowed?
can she have yellowed?
can we have yellowed?
can you have yellowed?
can they have yellowed? 	can I have been yellowing?
can you have been yellowing?
can she have been yellowing?
can we have been yellowing?
can you have been yellowing?
can they have been yellowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I yellow?
can't you yellow?
can't she yellow?
can't we yellow?
can't you yellow?
can't they yellow? 	can't I be yellowing?
can't you be yellowing?
can't she be yellowing?
can't we be yellowing?
can't you be yellowing?
can't they be yellowing? 	can't I have yellowed?
can't you have yellowed?
can't she have yellowed?
can't we have yellowed?
can't you have yellowed?
can't they have yellowed? 	can't I have been yellowing?
can't you have been yellowing?
can't she have been yellowing?
can't we have been yellowing?
can't you have been yellowing?
can't they have been yellowing?