English verb conjugation
COULD HARVEST

Regular verb: harvest - harvested - harvested

Affirmation

Simple form	V-ing form
I could harvest you could harvest he could harvest we could harvest you could harvest they could harvest	I could be harvesting you could be harvesting he could be harvesting we could be harvesting you could be harvesting they could be harvesting
Perfect	V-ing perfect
I could have harvested you could have harvested he could have harvested we could have harvested you could have harvested they could have harvested	I could have been harvesting you could have been harvesting he could have been harvesting we could have been harvesting you could have been harvesting they could have been harvesting

Negation

Simple form	V-ing form
I couldn't harvest you couldn't harvest he couldn't harvest we couldn't harvest you couldn't harvest they couldn't harvest	I couldn't be harvesting you couldn't be harvesting he couldn't be harvesting we couldn't be harvesting you couldn't be harvesting they couldn't be harvesting
Perfect	V-ing perfect
I couldn't have harvested you couldn't have harvested he couldn't have harvested we couldn't have harvested you couldn't have harvested they couldn't have harvested	I couldn't have been harvesting you couldn't have been harvesting he couldn't have been harvesting we couldn't have been harvesting you couldn't have been harvesting they couldn't have been harvesting

Interrogative form

Simple form	V-ing form
could I harvest? could you harvest? could he harvest? could we harvest? could you harvest? could they harvest?	could I be harvesting? could you be harvesting? could he be harvesting? could we be harvesting? could you be harvesting? could they be harvesting?
Perfect	V-ing perfect
could I have harvested? could you have harvested? could he have harvested? could we have harvested? could you have harvested? could they have harvested?	could I have been harvesting? could you have been harvesting? could he have been harvesting? could we have been harvesting? could you have been harvesting? could they have been harvesting?

Interro-negative form

Simple form	V-ing form
couldn't I harvest? couldn't you harvest? couldn't he harvest? couldn't we harvest? couldn't you harvest? couldn't they harvest?	couldn't I be harvesting? couldn't you be harvesting? couldn't he be harvesting? couldn't we be harvesting? couldn't you be harvesting? couldn't they be harvesting?
Perfect	V-ing perfect
couldn't I have harvested? couldn't you have harvested? couldn't he have harvested? couldn't we have harvested? couldn't you have harvested? couldn't they have harvested?	couldn't I have been harvesting? couldn't you have been harvesting? couldn't he have been harvesting? couldn't we have been harvesting? couldn't you have been harvesting? couldn't they have been harvesting?