English verb conjugation
COULD SINGLE-CLICK

Regular verb: single-click - single-clicked - single-clicked

Affirmation

Simple form	V-ing form
I could single-click you could single-click he could single-click we could single-click you could single-click they could single-click	I could be single-clicking you could be single-clicking he could be single-clicking we could be single-clicking you could be single-clicking they could be single-clicking
Perfect	V-ing perfect
I could have single-clicked you could have single-clicked he could have single-clicked we could have single-clicked you could have single-clicked they could have single-clicked	I could have been single-clicking you could have been single-clicking he could have been single-clicking we could have been single-clicking you could have been single-clicking they could have been single-clicking

Negation

Simple form	V-ing form
I couldn't single-click you couldn't single-click he couldn't single-click we couldn't single-click you couldn't single-click they couldn't single-click	I couldn't be single-clicking you couldn't be single-clicking he couldn't be single-clicking we couldn't be single-clicking you couldn't be single-clicking they couldn't be single-clicking
Perfect	V-ing perfect
I couldn't have single-clicked you couldn't have single-clicked he couldn't have single-clicked we couldn't have single-clicked you couldn't have single-clicked they couldn't have single-clicked	I couldn't have been single-clicking you couldn't have been single-clicking he couldn't have been single-clicking we couldn't have been single-clicking you couldn't have been single-clicking they couldn't have been single-clicking

Interrogative form

Simple form	V-ing form
could I single-click? could you single-click? could he single-click? could we single-click? could you single-click? could they single-click?	could I be single-clicking? could you be single-clicking? could he be single-clicking? could we be single-clicking? could you be single-clicking? could they be single-clicking?
Perfect	V-ing perfect
could I have single-clicked? could you have single-clicked? could he have single-clicked? could we have single-clicked? could you have single-clicked? could they have single-clicked?	could I have been single-clicking? could you have been single-clicking? could he have been single-clicking? could we have been single-clicking? could you have been single-clicking? could they have been single-clicking?

Interro-negative form

Simple form	V-ing form
couldn't I single-click? couldn't you single-click? couldn't he single-click? couldn't we single-click? couldn't you single-click? couldn't they single-click?	couldn't I be single-clicking? couldn't you be single-clicking? couldn't he be single-clicking? couldn't we be single-clicking? couldn't you be single-clicking? couldn't they be single-clicking?
Perfect	V-ing perfect
couldn't I have single-clicked? couldn't you have single-clicked? couldn't he have single-clicked? couldn't we have single-clicked? couldn't you have single-clicked? couldn't they have single-clicked?	couldn't I have been single-clicking? couldn't you have been single-clicking? couldn't he have been single-clicking? couldn't we have been single-clicking? couldn't you have been single-clicking? couldn't they have been single-clicking?