English verb conjugation
COULD HEAT-TREAT

Regular verb: heat-treat - heat-treated - heat-treated

Affirmation

Simple form	V-ing form
I could heat-treat you could heat-treat he could heat-treat we could heat-treat you could heat-treat they could heat-treat	I could be heat-treating you could be heat-treating he could be heat-treating we could be heat-treating you could be heat-treating they could be heat-treating
Perfect	V-ing perfect
I could have heat-treated you could have heat-treated he could have heat-treated we could have heat-treated you could have heat-treated they could have heat-treated	I could have been heat-treating you could have been heat-treating he could have been heat-treating we could have been heat-treating you could have been heat-treating they could have been heat-treating

Negation

Simple form	V-ing form
I couldn't heat-treat you couldn't heat-treat he couldn't heat-treat we couldn't heat-treat you couldn't heat-treat they couldn't heat-treat	I couldn't be heat-treating you couldn't be heat-treating he couldn't be heat-treating we couldn't be heat-treating you couldn't be heat-treating they couldn't be heat-treating
Perfect	V-ing perfect
I couldn't have heat-treated you couldn't have heat-treated he couldn't have heat-treated we couldn't have heat-treated you couldn't have heat-treated they couldn't have heat-treated	I couldn't have been heat-treating you couldn't have been heat-treating he couldn't have been heat-treating we couldn't have been heat-treating you couldn't have been heat-treating they couldn't have been heat-treating

Interrogative form

Simple form	V-ing form
could I heat-treat? could you heat-treat? could he heat-treat? could we heat-treat? could you heat-treat? could they heat-treat?	could I be heat-treating? could you be heat-treating? could he be heat-treating? could we be heat-treating? could you be heat-treating? could they be heat-treating?
Perfect	V-ing perfect
could I have heat-treated? could you have heat-treated? could he have heat-treated? could we have heat-treated? could you have heat-treated? could they have heat-treated?	could I have been heat-treating? could you have been heat-treating? could he have been heat-treating? could we have been heat-treating? could you have been heat-treating? could they have been heat-treating?

Interro-negative form

Simple form	V-ing form
couldn't I heat-treat? couldn't you heat-treat? couldn't he heat-treat? couldn't we heat-treat? couldn't you heat-treat? couldn't they heat-treat?	couldn't I be heat-treating? couldn't you be heat-treating? couldn't he be heat-treating? couldn't we be heat-treating? couldn't you be heat-treating? couldn't they be heat-treating?
Perfect	V-ing perfect
couldn't I have heat-treated? couldn't you have heat-treated? couldn't he have heat-treated? couldn't we have heat-treated? couldn't you have heat-treated? couldn't they have heat-treated?	couldn't I have been heat-treating? couldn't you have been heat-treating? couldn't he have been heat-treating? couldn't we have been heat-treating? couldn't you have been heat-treating? couldn't they have been heat-treating?