English verb conjugation
COULD LEMMATISE

Regular verb: lemmatise - lemmatised - lemmatised

Affirmation

Simple form	V-ing form
I could lemmatise you could lemmatise he could lemmatise we could lemmatise you could lemmatise they could lemmatise	I could be lemmatising you could be lemmatising he could be lemmatising we could be lemmatising you could be lemmatising they could be lemmatising
Perfect	V-ing perfect
I could have lemmatised you could have lemmatised he could have lemmatised we could have lemmatised you could have lemmatised they could have lemmatised	I could have been lemmatising you could have been lemmatising he could have been lemmatising we could have been lemmatising you could have been lemmatising they could have been lemmatising

Negation

Simple form	V-ing form
I couldn't lemmatise you couldn't lemmatise he couldn't lemmatise we couldn't lemmatise you couldn't lemmatise they couldn't lemmatise	I couldn't be lemmatising you couldn't be lemmatising he couldn't be lemmatising we couldn't be lemmatising you couldn't be lemmatising they couldn't be lemmatising
Perfect	V-ing perfect
I couldn't have lemmatised you couldn't have lemmatised he couldn't have lemmatised we couldn't have lemmatised you couldn't have lemmatised they couldn't have lemmatised	I couldn't have been lemmatising you couldn't have been lemmatising he couldn't have been lemmatising we couldn't have been lemmatising you couldn't have been lemmatising they couldn't have been lemmatising

Interrogative form

Simple form	V-ing form
could I lemmatise? could you lemmatise? could he lemmatise? could we lemmatise? could you lemmatise? could they lemmatise?	could I be lemmatising? could you be lemmatising? could he be lemmatising? could we be lemmatising? could you be lemmatising? could they be lemmatising?
Perfect	V-ing perfect
could I have lemmatised? could you have lemmatised? could he have lemmatised? could we have lemmatised? could you have lemmatised? could they have lemmatised?	could I have been lemmatising? could you have been lemmatising? could he have been lemmatising? could we have been lemmatising? could you have been lemmatising? could they have been lemmatising?

Interro-negative form

Simple form	V-ing form
couldn't I lemmatise? couldn't you lemmatise? couldn't he lemmatise? couldn't we lemmatise? couldn't you lemmatise? couldn't they lemmatise?	couldn't I be lemmatising? couldn't you be lemmatising? couldn't he be lemmatising? couldn't we be lemmatising? couldn't you be lemmatising? couldn't they be lemmatising?
Perfect	V-ing perfect
couldn't I have lemmatised? couldn't you have lemmatised? couldn't he have lemmatised? couldn't we have lemmatised? couldn't you have lemmatised? couldn't they have lemmatised?	couldn't I have been lemmatising? couldn't you have been lemmatising? couldn't he have been lemmatising? couldn't we have been lemmatising? couldn't you have been lemmatising? couldn't they have been lemmatising?