English verb conjugation
CAN TWITTER

Regular verb: twitter - twittered - twittered

Affirmation

Simple form	V-ing form
I can twitter you can twitter he can twitter we can twitter you can twitter they can twitter	I can be twittering you can be twittering he can be twittering we can be twittering you can be twittering they can be twittering
Perfect	V-ing perfect
I can have twittered you can have twittered he can have twittered we can have twittered you can have twittered they can have twittered	I can have been twittering you can have been twittering he can have been twittering we can have been twittering you can have been twittering they can have been twittering

Negation

Simple form	V-ing form
I can't twitter you can't twitter he can't twitter we can't twitter you can't twitter they can't twitter	I can't be twittering you can't be twittering he can't be twittering we can't be twittering you can't be twittering they can't be twittering
Perfect	V-ing perfect
I can't have twittered you can't have twittered he can't have twittered we can't have twittered you can't have twittered they can't have twittered	I can't have been twittering you can't have been twittering he can't have been twittering we can't have been twittering you can't have been twittering they can't have been twittering

Interrogative form

Simple form	V-ing form
can I twitter? can you twitter? can he twitter? can we twitter? can you twitter? can they twitter?	can I be twittering? can you be twittering? can he be twittering? can we be twittering? can you be twittering? can they be twittering?
Perfect	V-ing perfect
can I have twittered? can you have twittered? can he have twittered? can we have twittered? can you have twittered? can they have twittered?	can I have been twittering? can you have been twittering? can he have been twittering? can we have been twittering? can you have been twittering? can they have been twittering?

Interro-negative form

Simple form	V-ing form
can't I twitter? can't you twitter? can't he twitter? can't we twitter? can't you twitter? can't they twitter?	can't I be twittering? can't you be twittering? can't he be twittering? can't we be twittering? can't you be twittering? can't they be twittering?
Perfect	V-ing perfect
can't I have twittered? can't you have twittered? can't he have twittered? can't we have twittered? can't you have twittered? can't they have twittered?	can't I have been twittering? can't you have been twittering? can't he have been twittering? can't we have been twittering? can't you have been twittering? can't they have been twittering?