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