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