I could flight-test you could flight-test he could flight-test we could flight-test you could flight-test they could flight-test
Forme en V-ing
I could be flight-testing you could be flight-testing he could be flight-testing we could be flight-testing you could be flight-testing they could be flight-testing
Perfect
I could have flight-tested you could have flight-tested he could have flight-tested we could have flight-tested you could have flight-tested they could have flight-tested
Perfect en V-ing
I could have been flight-testing you could have been flight-testing he could have been flight-testing we could have been flight-testing you could have been flight-testing they could have been flight-testing
Négation
Forme simple
I couldn't flight-test you couldn't flight-test he couldn't flight-test we couldn't flight-test you couldn't flight-test they couldn't flight-test
Forme en V-ing
I couldn't be flight-testing you couldn't be flight-testing he couldn't be flight-testing we couldn't be flight-testing you couldn't be flight-testing they couldn't be flight-testing
Perfect
I couldn't have flight-tested you couldn't have flight-tested he couldn't have flight-tested we couldn't have flight-tested you couldn't have flight-tested they couldn't have flight-tested
Perfect en V-ing
I couldn't have been flight-testing you couldn't have been flight-testing he couldn't have been flight-testing we couldn't have been flight-testing you couldn't have been flight-testing they couldn't have been flight-testing
Forme interrogative
Forme simple
could I flight-test? could you flight-test? could he flight-test? could we flight-test? could you flight-test? could they flight-test?
Forme en V-ing
could I be flight-testing? could you be flight-testing? could he be flight-testing? could we be flight-testing? could you be flight-testing? could they be flight-testing?
Perfect
could I have flight-tested? could you have flight-tested? could he have flight-tested? could we have flight-tested? could you have flight-tested? could they have flight-tested?
Perfect en V-ing
could I have been flight-testing? could you have been flight-testing? could he have been flight-testing? could we have been flight-testing? could you have been flight-testing? could they have been flight-testing?
Forme interro-négative
Forme simple
couldn't I flight-test? couldn't you flight-test? couldn't he flight-test? couldn't we flight-test? couldn't you flight-test? couldn't they flight-test?
Forme en V-ing
couldn't I be flight-testing? couldn't you be flight-testing? couldn't he be flight-testing? couldn't we be flight-testing? couldn't you be flight-testing? couldn't they be flight-testing?
Perfect
couldn't I have flight-tested? couldn't you have flight-tested? couldn't he have flight-tested? couldn't we have flight-tested? couldn't you have flight-tested? couldn't they have flight-tested?
Perfect en V-ing
couldn't I have been flight-testing? couldn't you have been flight-testing? couldn't he have been flight-testing? couldn't we have been flight-testing? couldn't you have been flight-testing? couldn't they have been flight-testing?