can thumbtack
Verbe régulier : thumbtack - thumbtacked- thumbtacked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can thumbtack
you can thumbtack
she can thumbtack
we can thumbtack
you can thumbtack
they can thumbtack 	I can be thumbtacking
you can be thumbtacking
she can be thumbtacking
we can be thumbtacking
you can be thumbtacking
they can be thumbtacking	I can have thumbtacked
you can have thumbtacked
she can have thumbtacked
we can have thumbtacked
you can have thumbtacked
they can have thumbtacked	I can have been thumbtacking
you can have been thumbtacking
she can have been thumbtacking
we can have been thumbtacking
you can have been thumbtacking
they can have been thumbtacking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can't thumbtack
you can't thumbtack
she can't thumbtack
we can't thumbtack
you can't thumbtack
they can't thumbtack 	I can't be thumbtacking
you can't be thumbtacking
she can't be thumbtacking
we can't be thumbtacking
you can't be thumbtacking
they can't be thumbtacking	I can't have thumbtacked
you can't have thumbtacked
she can't have thumbtacked
we can't have thumbtacked
you can't have thumbtacked
they can't have thumbtacked	I can't have been thumbtacking
you can't have been thumbtacking
she can't have been thumbtacking
we can't have been thumbtacking
you can't have been thumbtacking
they can't have been thumbtacking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I thumbtack?
can you thumbtack?
can she thumbtack?
can we thumbtack?
can you thumbtack?
can they thumbtack? 	can I be thumbtacking?
can you be thumbtacking?
can she be thumbtacking?
can we be thumbtacking?
can you be thumbtacking?
can they be thumbtacking? 	can I have thumbtacked?
can you have thumbtacked?
can she have thumbtacked?
can we have thumbtacked?
can you have thumbtacked?
can they have thumbtacked? 	can I have been thumbtacking?
can you have been thumbtacking?
can she have been thumbtacking?
can we have been thumbtacking?
can you have been thumbtacking?
can they have been thumbtacking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can't I thumbtack?
can't you thumbtack?
can't she thumbtack?
can't we thumbtack?
can't you thumbtack?
can't they thumbtack? 	can't I be thumbtacking?
can't you be thumbtacking?
can't she be thumbtacking?
can't we be thumbtacking?
can't you be thumbtacking?
can't they be thumbtacking? 	can't I have thumbtacked?
can't you have thumbtacked?
can't she have thumbtacked?
can't we have thumbtacked?
can't you have thumbtacked?
can't they have thumbtacked? 	can't I have been thumbtacking?
can't you have been thumbtacking?
can't she have been thumbtacking?
can't we have been thumbtacking?
can't you have been thumbtacking?
can't they have been thumbtacking?