English verb conjugation
COULD TRELLIS

Regular verb: trellis - trellised - trellised

Affirmation

Simple form	V-ing form
I could trellis you could trellis he could trellis we could trellis you could trellis they could trellis	I could be trellising you could be trellising he could be trellising we could be trellising you could be trellising they could be trellising
Perfect	V-ing perfect
I could have trellised you could have trellised he could have trellised we could have trellised you could have trellised they could have trellised	I could have been trellising you could have been trellising he could have been trellising we could have been trellising you could have been trellising they could have been trellising

Negation

Simple form	V-ing form
I couldn't trellis you couldn't trellis he couldn't trellis we couldn't trellis you couldn't trellis they couldn't trellis	I couldn't be trellising you couldn't be trellising he couldn't be trellising we couldn't be trellising you couldn't be trellising they couldn't be trellising
Perfect	V-ing perfect
I couldn't have trellised you couldn't have trellised he couldn't have trellised we couldn't have trellised you couldn't have trellised they couldn't have trellised	I couldn't have been trellising you couldn't have been trellising he couldn't have been trellising we couldn't have been trellising you couldn't have been trellising they couldn't have been trellising

Interrogative form

Simple form	V-ing form
could I trellis? could you trellis? could he trellis? could we trellis? could you trellis? could they trellis?	could I be trellising? could you be trellising? could he be trellising? could we be trellising? could you be trellising? could they be trellising?
Perfect	V-ing perfect
could I have trellised? could you have trellised? could he have trellised? could we have trellised? could you have trellised? could they have trellised?	could I have been trellising? could you have been trellising? could he have been trellising? could we have been trellising? could you have been trellising? could they have been trellising?

Interro-negative form

Simple form	V-ing form
couldn't I trellis? couldn't you trellis? couldn't he trellis? couldn't we trellis? couldn't you trellis? couldn't they trellis?	couldn't I be trellising? couldn't you be trellising? couldn't he be trellising? couldn't we be trellising? couldn't you be trellising? couldn't they be trellising?
Perfect	V-ing perfect
couldn't I have trellised? couldn't you have trellised? couldn't he have trellised? couldn't we have trellised? couldn't you have trellised? couldn't they have trellised?	couldn't I have been trellising? couldn't you have been trellising? couldn't he have been trellising? couldn't we have been trellising? couldn't you have been trellising? couldn't they have been trellising?