English verb conjugation
CAN TWINKLE

Regular verb: twinkle - twinkled - twinkled

Affirmation

Simple form	V-ing form
I can twinkle you can twinkle she can twinkle we can twinkle you can twinkle they can twinkle	I can be twinkling you can be twinkling she can be twinkling we can be twinkling you can be twinkling they can be twinkling
Perfect	V-ing perfect
I can have twinkled you can have twinkled she can have twinkled we can have twinkled you can have twinkled they can have twinkled	I can have been twinkling you can have been twinkling she can have been twinkling we can have been twinkling you can have been twinkling they can have been twinkling

Negation

Simple form	V-ing form
I can't twinkle you can't twinkle she can't twinkle we can't twinkle you can't twinkle they can't twinkle	I can't be twinkling you can't be twinkling she can't be twinkling we can't be twinkling you can't be twinkling they can't be twinkling
Perfect	V-ing perfect
I can't have twinkled you can't have twinkled she can't have twinkled we can't have twinkled you can't have twinkled they can't have twinkled	I can't have been twinkling you can't have been twinkling she can't have been twinkling we can't have been twinkling you can't have been twinkling they can't have been twinkling

Interrogative form

Simple form	V-ing form
can I twinkle? can you twinkle? can she twinkle? can we twinkle? can you twinkle? can they twinkle?	can I be twinkling? can you be twinkling? can she be twinkling? can we be twinkling? can you be twinkling? can they be twinkling?
Perfect	V-ing perfect
can I have twinkled? can you have twinkled? can she have twinkled? can we have twinkled? can you have twinkled? can they have twinkled?	can I have been twinkling? can you have been twinkling? can she have been twinkling? can we have been twinkling? can you have been twinkling? can they have been twinkling?

Interro-negative form

Simple form	V-ing form
can't I twinkle? can't you twinkle? can't she twinkle? can't we twinkle? can't you twinkle? can't they twinkle?	can't I be twinkling? can't you be twinkling? can't she be twinkling? can't we be twinkling? can't you be twinkling? can't they be twinkling?
Perfect	V-ing perfect
can't I have twinkled? can't you have twinkled? can't she have twinkled? can't we have twinkled? can't you have twinkled? can't they have twinkled?	can't I have been twinkling? can't you have been twinkling? can't she have been twinkling? can't we have been twinkling? can't you have been twinkling? can't they have been twinkling?