I could bruise you could bruise she could bruise we could bruise you could bruise they could bruise
V-ing form
I could be bruising you could be bruising she could be bruising we could be bruising you could be bruising they could be bruising
Perfect
I could have bruised you could have bruised she could have bruised we could have bruised you could have bruised they could have bruised
V-ing perfect
I could have been bruising you could have been bruising she could have been bruising we could have been bruising you could have been bruising they could have been bruising
Negation
Simple form
I could not bruise you could not bruise she could not bruise we could not bruise you could not bruise they could not bruise
V-ing form
I could not be bruising you could not be bruising she could not be bruising we could not be bruising you could not be bruising they could not be bruising
Perfect
I could not have bruised you could not have bruised she could not have bruised we could not have bruised you could not have bruised they could not have bruised
V-ing perfect
I could not have been bruising you could not have been bruising she could not have been bruising we could not have been bruising you could not have been bruising they could not have been bruising
Interrogative form
Simple form
could I bruise? could you bruise? could she bruise? could we bruise? could you bruise? could they bruise?
V-ing form
could I be bruising? could you be bruising? could she be bruising? could we be bruising? could you be bruising? could they be bruising?
Perfect
could I have bruised? could you have bruised? could she have bruised? could we have bruised? could you have bruised? could they have bruised?
V-ing perfect
could I have been bruising? could you have been bruising? could she have been bruising? could we have been bruising? could you have been bruising? could they have been bruising?
Interro-negative form
Simple form
could I not bruise? could you not bruise? could she not bruise? could we not bruise? could you not bruise? could they not bruise?
V-ing form
could I not be bruising? could you not be bruising? could she not be bruising? could we not be bruising? could you not be bruising? could they not be bruising?
Perfect
could I not have bruised? could you not have bruised? could she not have bruised? could we not have bruised? could you not have bruised? could they not have bruised?
V-ing perfect
could I not have been bruising? could you not have been bruising? could she not have been bruising? could we not have been bruising? could you not have been bruising? could they not have been bruising?