I can estimate you can estimate he can estimate we can estimate you can estimate they can estimate
Forme en V-ing
I can be estimating you can be estimating he can be estimating we can be estimating you can be estimating they can be estimating
Perfect
I can have estimated you can have estimated he can have estimated we can have estimated you can have estimated they can have estimated
Perfect en V-ing
I can have been estimating you can have been estimating he can have been estimating we can have been estimating you can have been estimating they can have been estimating
Négation
Forme simple
I cannot estimate you cannot estimate he cannot estimate we cannot estimate you cannot estimate they cannot estimate
Forme en V-ing
I cannot be estimating you cannot be estimating he cannot be estimating we cannot be estimating you cannot be estimating they cannot be estimating
Perfect
I cannot have estimated you cannot have estimated he cannot have estimated we cannot have estimated you cannot have estimated they cannot have estimated
Perfect en V-ing
I cannot have been estimating you cannot have been estimating he cannot have been estimating we cannot have been estimating you cannot have been estimating they cannot have been estimating
Forme interrogative
Forme simple
can I estimate? can you estimate? can he estimate? can we estimate? can you estimate? can they estimate?
Forme en V-ing
can I be estimating? can you be estimating? can he be estimating? can we be estimating? can you be estimating? can they be estimating?
Perfect
can I have estimated? can you have estimated? can he have estimated? can we have estimated? can you have estimated? can they have estimated?
Perfect en V-ing
can I have been estimating? can you have been estimating? can he have been estimating? can we have been estimating? can you have been estimating? can they have been estimating?
Forme interro-négative
Forme simple
can I not estimate? can you not estimate? can he not estimate? can we not estimate? can you not estimate? can they not estimate?
Forme en V-ing
can I not be estimating? can you not be estimating? can he not be estimating? can we not be estimating? can you not be estimating? can they not be estimating?
Perfect
can I not have estimated? can you not have estimated? can he not have estimated? can we not have estimated? can you not have estimated? can they not have estimated?
Perfect en V-ing
can I not have been estimating? can you not have been estimating? can he not have been estimating? can we not have been estimating? can you not have been estimating? can they not have been estimating?