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 couldn't bruise you couldn't bruise she couldn't bruise we couldn't bruise you couldn't bruise they couldn't bruise
V-ing form
I couldn't be bruising you couldn't be bruising she couldn't be bruising we couldn't be bruising you couldn't be bruising they couldn't be bruising
Perfect
I couldn't have bruised you couldn't have bruised she couldn't have bruised we couldn't have bruised you couldn't have bruised they couldn't have bruised
V-ing perfect
I couldn't have been bruising you couldn't have been bruising she couldn't have been bruising we couldn't have been bruising you couldn't have been bruising they couldn't 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
couldn't I bruise? couldn't you bruise? couldn't she bruise? couldn't we bruise? couldn't you bruise? couldn't they bruise?
V-ing form
couldn't I be bruising? couldn't you be bruising? couldn't she be bruising? couldn't we be bruising? couldn't you be bruising? couldn't they be bruising?
Perfect
couldn't I have bruised? couldn't you have bruised? couldn't she have bruised? couldn't we have bruised? couldn't you have bruised? couldn't they have bruised?
V-ing perfect
couldn't I have been bruising? couldn't you have been bruising? couldn't she have been bruising? couldn't we have been bruising? couldn't you have been bruising? couldn't they have been bruising?