I could tranquillise you could tranquillise he could tranquillise we could tranquillise you could tranquillise they could tranquillise
V-ing form
I could be tranquillising you could be tranquillising he could be tranquillising we could be tranquillising you could be tranquillising they could be tranquillising
Perfect
I could have tranquillised you could have tranquillised he could have tranquillised we could have tranquillised you could have tranquillised they could have tranquillised
V-ing perfect
I could have been tranquillising you could have been tranquillising he could have been tranquillising we could have been tranquillising you could have been tranquillising they could have been tranquillising
Negation
Simple form
I couldn't tranquillise you couldn't tranquillise he couldn't tranquillise we couldn't tranquillise you couldn't tranquillise they couldn't tranquillise
V-ing form
I couldn't be tranquillising you couldn't be tranquillising he couldn't be tranquillising we couldn't be tranquillising you couldn't be tranquillising they couldn't be tranquillising
Perfect
I couldn't have tranquillised you couldn't have tranquillised he couldn't have tranquillised we couldn't have tranquillised you couldn't have tranquillised they couldn't have tranquillised
V-ing perfect
I couldn't have been tranquillising you couldn't have been tranquillising he couldn't have been tranquillising we couldn't have been tranquillising you couldn't have been tranquillising they couldn't have been tranquillising
Interrogative form
Simple form
could I tranquillise? could you tranquillise? could he tranquillise? could we tranquillise? could you tranquillise? could they tranquillise?
V-ing form
could I be tranquillising? could you be tranquillising? could he be tranquillising? could we be tranquillising? could you be tranquillising? could they be tranquillising?
Perfect
could I have tranquillised? could you have tranquillised? could he have tranquillised? could we have tranquillised? could you have tranquillised? could they have tranquillised?
V-ing perfect
could I have been tranquillising? could you have been tranquillising? could he have been tranquillising? could we have been tranquillising? could you have been tranquillising? could they have been tranquillising?
Interro-negative form
Simple form
couldn't I tranquillise? couldn't you tranquillise? couldn't he tranquillise? couldn't we tranquillise? couldn't you tranquillise? couldn't they tranquillise?
V-ing form
couldn't I be tranquillising? couldn't you be tranquillising? couldn't he be tranquillising? couldn't we be tranquillising? couldn't you be tranquillising? couldn't they be tranquillising?
Perfect
couldn't I have tranquillised? couldn't you have tranquillised? couldn't he have tranquillised? couldn't we have tranquillised? couldn't you have tranquillised? couldn't they have tranquillised?
V-ing perfect
couldn't I have been tranquillising? couldn't you have been tranquillising? couldn't he have been tranquillising? couldn't we have been tranquillising? couldn't you have been tranquillising? couldn't they have been tranquillising?