English verb conjugation
CAN SMOOTHEN

Regular verb: smoothen - smoothened - smoothened

Affirmation

Simple form	V-ing form
I can smoothen you can smoothen she can smoothen we can smoothen you can smoothen they can smoothen	I can be smoothening you can be smoothening she can be smoothening we can be smoothening you can be smoothening they can be smoothening
Perfect	V-ing perfect
I can have smoothened you can have smoothened she can have smoothened we can have smoothened you can have smoothened they can have smoothened	I can have been smoothening you can have been smoothening she can have been smoothening we can have been smoothening you can have been smoothening they can have been smoothening

Negation

Simple form	V-ing form
I can't smoothen you can't smoothen she can't smoothen we can't smoothen you can't smoothen they can't smoothen	I can't be smoothening you can't be smoothening she can't be smoothening we can't be smoothening you can't be smoothening they can't be smoothening
Perfect	V-ing perfect
I can't have smoothened you can't have smoothened she can't have smoothened we can't have smoothened you can't have smoothened they can't have smoothened	I can't have been smoothening you can't have been smoothening she can't have been smoothening we can't have been smoothening you can't have been smoothening they can't have been smoothening

Interrogative form

Simple form	V-ing form
can I smoothen? can you smoothen? can she smoothen? can we smoothen? can you smoothen? can they smoothen?	can I be smoothening? can you be smoothening? can she be smoothening? can we be smoothening? can you be smoothening? can they be smoothening?
Perfect	V-ing perfect
can I have smoothened? can you have smoothened? can she have smoothened? can we have smoothened? can you have smoothened? can they have smoothened?	can I have been smoothening? can you have been smoothening? can she have been smoothening? can we have been smoothening? can you have been smoothening? can they have been smoothening?

Interro-negative form

Simple form	V-ing form
can't I smoothen? can't you smoothen? can't she smoothen? can't we smoothen? can't you smoothen? can't they smoothen?	can't I be smoothening? can't you be smoothening? can't she be smoothening? can't we be smoothening? can't you be smoothening? can't they be smoothening?
Perfect	V-ing perfect
can't I have smoothened? can't you have smoothened? can't she have smoothened? can't we have smoothened? can't you have smoothened? can't they have smoothened?	can't I have been smoothening? can't you have been smoothening? can't she have been smoothening? can't we have been smoothening? can't you have been smoothening? can't they have been smoothening?