English verb conjugation
COULD ALPHABETISE

Regular verb: alphabetise - alphabetised - alphabetised

Affirmation

Simple form	V-ing form
I could alphabetise you could alphabetise he could alphabetise we could alphabetise you could alphabetise they could alphabetise	I could be alphabetising you could be alphabetising he could be alphabetising we could be alphabetising you could be alphabetising they could be alphabetising
Perfect	V-ing perfect
I could have alphabetised you could have alphabetised he could have alphabetised we could have alphabetised you could have alphabetised they could have alphabetised	I could have been alphabetising you could have been alphabetising he could have been alphabetising we could have been alphabetising you could have been alphabetising they could have been alphabetising

Negation

Simple form	V-ing form
I couldn't alphabetise you couldn't alphabetise he couldn't alphabetise we couldn't alphabetise you couldn't alphabetise they couldn't alphabetise	I couldn't be alphabetising you couldn't be alphabetising he couldn't be alphabetising we couldn't be alphabetising you couldn't be alphabetising they couldn't be alphabetising
Perfect	V-ing perfect
I couldn't have alphabetised you couldn't have alphabetised he couldn't have alphabetised we couldn't have alphabetised you couldn't have alphabetised they couldn't have alphabetised	I couldn't have been alphabetising you couldn't have been alphabetising he couldn't have been alphabetising we couldn't have been alphabetising you couldn't have been alphabetising they couldn't have been alphabetising

Interrogative form

Simple form	V-ing form
could I alphabetise? could you alphabetise? could he alphabetise? could we alphabetise? could you alphabetise? could they alphabetise?	could I be alphabetising? could you be alphabetising? could he be alphabetising? could we be alphabetising? could you be alphabetising? could they be alphabetising?
Perfect	V-ing perfect
could I have alphabetised? could you have alphabetised? could he have alphabetised? could we have alphabetised? could you have alphabetised? could they have alphabetised?	could I have been alphabetising? could you have been alphabetising? could he have been alphabetising? could we have been alphabetising? could you have been alphabetising? could they have been alphabetising?

Interro-negative form

Simple form	V-ing form
couldn't I alphabetise? couldn't you alphabetise? couldn't he alphabetise? couldn't we alphabetise? couldn't you alphabetise? couldn't they alphabetise?	couldn't I be alphabetising? couldn't you be alphabetising? couldn't he be alphabetising? couldn't we be alphabetising? couldn't you be alphabetising? couldn't they be alphabetising?
Perfect	V-ing perfect
couldn't I have alphabetised? couldn't you have alphabetised? couldn't he have alphabetised? couldn't we have alphabetised? couldn't you have alphabetised? couldn't they have alphabetised?	couldn't I have been alphabetising? couldn't you have been alphabetising? couldn't he have been alphabetising? couldn't we have been alphabetising? couldn't you have been alphabetising? couldn't they have been alphabetising?