English verb conjugation
COULD LAUNCH

Regular verb: launch - launched - launched

Affirmation

Simple form	V-ing form
I could launch you could launch he could launch we could launch you could launch they could launch	I could be launching you could be launching he could be launching we could be launching you could be launching they could be launching
Perfect	V-ing perfect
I could have launched you could have launched he could have launched we could have launched you could have launched they could have launched	I could have been launching you could have been launching he could have been launching we could have been launching you could have been launching they could have been launching

Negation

Simple form	V-ing form
I couldn't launch you couldn't launch he couldn't launch we couldn't launch you couldn't launch they couldn't launch	I couldn't be launching you couldn't be launching he couldn't be launching we couldn't be launching you couldn't be launching they couldn't be launching
Perfect	V-ing perfect
I couldn't have launched you couldn't have launched he couldn't have launched we couldn't have launched you couldn't have launched they couldn't have launched	I couldn't have been launching you couldn't have been launching he couldn't have been launching we couldn't have been launching you couldn't have been launching they couldn't have been launching

Interrogative form

Simple form	V-ing form
could I launch? could you launch? could he launch? could we launch? could you launch? could they launch?	could I be launching? could you be launching? could he be launching? could we be launching? could you be launching? could they be launching?
Perfect	V-ing perfect
could I have launched? could you have launched? could he have launched? could we have launched? could you have launched? could they have launched?	could I have been launching? could you have been launching? could he have been launching? could we have been launching? could you have been launching? could they have been launching?

Interro-negative form

Simple form	V-ing form
couldn't I launch? couldn't you launch? couldn't he launch? couldn't we launch? couldn't you launch? couldn't they launch?	couldn't I be launching? couldn't you be launching? couldn't he be launching? couldn't we be launching? couldn't you be launching? couldn't they be launching?
Perfect	V-ing perfect
couldn't I have launched? couldn't you have launched? couldn't he have launched? couldn't we have launched? couldn't you have launched? couldn't they have launched?	couldn't I have been launching? couldn't you have been launching? couldn't he have been launching? couldn't we have been launching? couldn't you have been launching? couldn't they have been launching?