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