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