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