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