English verb conjugation
COULD SUMMARISE

Regular verb: summarise - summarised - summarised

Affirmation

Simple form	V-ing form
I could summarise you could summarise he could summarise we could summarise you could summarise they could summarise	I could be summarising you could be summarising he could be summarising we could be summarising you could be summarising they could be summarising
Perfect	V-ing perfect
I could have summarised you could have summarised he could have summarised we could have summarised you could have summarised they could have summarised	I could have been summarising you could have been summarising he could have been summarising we could have been summarising you could have been summarising they could have been summarising

Negation

Simple form	V-ing form
I couldn't summarise you couldn't summarise he couldn't summarise we couldn't summarise you couldn't summarise they couldn't summarise	I couldn't be summarising you couldn't be summarising he couldn't be summarising we couldn't be summarising you couldn't be summarising they couldn't be summarising
Perfect	V-ing perfect
I couldn't have summarised you couldn't have summarised he couldn't have summarised we couldn't have summarised you couldn't have summarised they couldn't have summarised	I couldn't have been summarising you couldn't have been summarising he couldn't have been summarising we couldn't have been summarising you couldn't have been summarising they couldn't have been summarising

Interrogative form

Simple form	V-ing form
could I summarise? could you summarise? could he summarise? could we summarise? could you summarise? could they summarise?	could I be summarising? could you be summarising? could he be summarising? could we be summarising? could you be summarising? could they be summarising?
Perfect	V-ing perfect
could I have summarised? could you have summarised? could he have summarised? could we have summarised? could you have summarised? could they have summarised?	could I have been summarising? could you have been summarising? could he have been summarising? could we have been summarising? could you have been summarising? could they have been summarising?

Interro-negative form

Simple form	V-ing form
couldn't I summarise? couldn't you summarise? couldn't he summarise? couldn't we summarise? couldn't you summarise? couldn't they summarise?	couldn't I be summarising? couldn't you be summarising? couldn't he be summarising? couldn't we be summarising? couldn't you be summarising? couldn't they be summarising?
Perfect	V-ing perfect
couldn't I have summarised? couldn't you have summarised? couldn't he have summarised? couldn't we have summarised? couldn't you have summarised? couldn't they have summarised?	couldn't I have been summarising? couldn't you have been summarising? couldn't he have been summarising? couldn't we have been summarising? couldn't you have been summarising? couldn't they have been summarising?