I can engage you can engage she can engage we can engage you can engage they can engage
V-ing form
I can be engaging you can be engaging she can be engaging we can be engaging you can be engaging they can be engaging
Perfect
I can have engaged you can have engaged she can have engaged we can have engaged you can have engaged they can have engaged
V-ing perfect
I can have been engaging you can have been engaging she can have been engaging we can have been engaging you can have been engaging they can have been engaging
Negation
Simple form
I cannot engage you cannot engage she cannot engage we cannot engage you cannot engage they cannot engage
V-ing form
I cannot be engaging you cannot be engaging she cannot be engaging we cannot be engaging you cannot be engaging they cannot be engaging
Perfect
I cannot have engaged you cannot have engaged she cannot have engaged we cannot have engaged you cannot have engaged they cannot have engaged
V-ing perfect
I cannot have been engaging you cannot have been engaging she cannot have been engaging we cannot have been engaging you cannot have been engaging they cannot have been engaging
Interrogative form
Simple form
can I engage? can you engage? can she engage? can we engage? can you engage? can they engage?
V-ing form
can I be engaging? can you be engaging? can she be engaging? can we be engaging? can you be engaging? can they be engaging?
Perfect
can I have engaged? can you have engaged? can she have engaged? can we have engaged? can you have engaged? can they have engaged?
V-ing perfect
can I have been engaging? can you have been engaging? can she have been engaging? can we have been engaging? can you have been engaging? can they have been engaging?
Interro-negative form
Simple form
can I not engage? can you not engage? can she not engage? can we not engage? can you not engage? can they not engage?
V-ing form
can I not be engaging? can you not be engaging? can she not be engaging? can we not be engaging? can you not be engaging? can they not be engaging?
Perfect
can I not have engaged? can you not have engaged? can she not have engaged? can we not have engaged? can you not have engaged? can they not have engaged?
V-ing perfect
can I not have been engaging? can you not have been engaging? can she not have been engaging? can we not have been engaging? can you not have been engaging? can they not have been engaging?