I could extemporise you could extemporise he could extemporise we could extemporise you could extemporise they could extemporise
Forme en V-ing
I could be extemporising you could be extemporising he could be extemporising we could be extemporising you could be extemporising they could be extemporising
Perfect
I could have extemporised you could have extemporised he could have extemporised we could have extemporised you could have extemporised they could have extemporised
Perfect en V-ing
I could have been extemporising you could have been extemporising he could have been extemporising we could have been extemporising you could have been extemporising they could have been extemporising
Négation
Forme simple
I couldn't extemporise you couldn't extemporise he couldn't extemporise we couldn't extemporise you couldn't extemporise they couldn't extemporise
Forme en V-ing
I couldn't be extemporising you couldn't be extemporising he couldn't be extemporising we couldn't be extemporising you couldn't be extemporising they couldn't be extemporising
Perfect
I couldn't have extemporised you couldn't have extemporised he couldn't have extemporised we couldn't have extemporised you couldn't have extemporised they couldn't have extemporised
Perfect en V-ing
I couldn't have been extemporising you couldn't have been extemporising he couldn't have been extemporising we couldn't have been extemporising you couldn't have been extemporising they couldn't have been extemporising
Forme interrogative
Forme simple
could I extemporise? could you extemporise? could he extemporise? could we extemporise? could you extemporise? could they extemporise?
Forme en V-ing
could I be extemporising? could you be extemporising? could he be extemporising? could we be extemporising? could you be extemporising? could they be extemporising?
Perfect
could I have extemporised? could you have extemporised? could he have extemporised? could we have extemporised? could you have extemporised? could they have extemporised?
Perfect en V-ing
could I have been extemporising? could you have been extemporising? could he have been extemporising? could we have been extemporising? could you have been extemporising? could they have been extemporising?
Forme interro-négative
Forme simple
couldn't I extemporise? couldn't you extemporise? couldn't he extemporise? couldn't we extemporise? couldn't you extemporise? couldn't they extemporise?
Forme en V-ing
couldn't I be extemporising? couldn't you be extemporising? couldn't he be extemporising? couldn't we be extemporising? couldn't you be extemporising? couldn't they be extemporising?
Perfect
couldn't I have extemporised? couldn't you have extemporised? couldn't he have extemporised? couldn't we have extemporised? couldn't you have extemporised? couldn't they have extemporised?
Perfect en V-ing
couldn't I have been extemporising? couldn't you have been extemporising? couldn't he have been extemporising? couldn't we have been extemporising? couldn't you have been extemporising? couldn't they have been extemporising?