English verb conjugation
COULD BOOM

Regular verb: boom - boomed - boomed

Affirmation

Simple form	V-ing form
I could boom you could boom he could boom we could boom you could boom they could boom	I could be booming you could be booming he could be booming we could be booming you could be booming they could be booming
Perfect	V-ing perfect
I could have boomed you could have boomed he could have boomed we could have boomed you could have boomed they could have boomed	I could have been booming you could have been booming he could have been booming we could have been booming you could have been booming they could have been booming

Negation

Simple form	V-ing form
I couldn't boom you couldn't boom he couldn't boom we couldn't boom you couldn't boom they couldn't boom	I couldn't be booming you couldn't be booming he couldn't be booming we couldn't be booming you couldn't be booming they couldn't be booming
Perfect	V-ing perfect
I couldn't have boomed you couldn't have boomed he couldn't have boomed we couldn't have boomed you couldn't have boomed they couldn't have boomed	I couldn't have been booming you couldn't have been booming he couldn't have been booming we couldn't have been booming you couldn't have been booming they couldn't have been booming

Interrogative form

Simple form	V-ing form
could I boom? could you boom? could he boom? could we boom? could you boom? could they boom?	could I be booming? could you be booming? could he be booming? could we be booming? could you be booming? could they be booming?
Perfect	V-ing perfect
could I have boomed? could you have boomed? could he have boomed? could we have boomed? could you have boomed? could they have boomed?	could I have been booming? could you have been booming? could he have been booming? could we have been booming? could you have been booming? could they have been booming?

Interro-negative form

Simple form	V-ing form
couldn't I boom? couldn't you boom? couldn't he boom? couldn't we boom? couldn't you boom? couldn't they boom?	couldn't I be booming? couldn't you be booming? couldn't he be booming? couldn't we be booming? couldn't you be booming? couldn't they be booming?
Perfect	V-ing perfect
couldn't I have boomed? couldn't you have boomed? couldn't he have boomed? couldn't we have boomed? couldn't you have boomed? couldn't they have boomed?	couldn't I have been booming? couldn't you have been booming? couldn't he have been booming? couldn't we have been booming? couldn't you have been booming? couldn't they have been booming?