English verb conjugation
COULD PRETRAIN

Regular verb: pretrain - pretrained - pretrained

Affirmation

Simple form	V-ing form
I could pretrain you could pretrain he could pretrain we could pretrain you could pretrain they could pretrain	I could be pretraining you could be pretraining he could be pretraining we could be pretraining you could be pretraining they could be pretraining
Perfect	V-ing perfect
I could have pretrained you could have pretrained he could have pretrained we could have pretrained you could have pretrained they could have pretrained	I could have been pretraining you could have been pretraining he could have been pretraining we could have been pretraining you could have been pretraining they could have been pretraining

Negation

Simple form	V-ing form
I couldn't pretrain you couldn't pretrain he couldn't pretrain we couldn't pretrain you couldn't pretrain they couldn't pretrain	I couldn't be pretraining you couldn't be pretraining he couldn't be pretraining we couldn't be pretraining you couldn't be pretraining they couldn't be pretraining
Perfect	V-ing perfect
I couldn't have pretrained you couldn't have pretrained he couldn't have pretrained we couldn't have pretrained you couldn't have pretrained they couldn't have pretrained	I couldn't have been pretraining you couldn't have been pretraining he couldn't have been pretraining we couldn't have been pretraining you couldn't have been pretraining they couldn't have been pretraining

Interrogative form

Simple form	V-ing form
could I pretrain? could you pretrain? could he pretrain? could we pretrain? could you pretrain? could they pretrain?	could I be pretraining? could you be pretraining? could he be pretraining? could we be pretraining? could you be pretraining? could they be pretraining?
Perfect	V-ing perfect
could I have pretrained? could you have pretrained? could he have pretrained? could we have pretrained? could you have pretrained? could they have pretrained?	could I have been pretraining? could you have been pretraining? could he have been pretraining? could we have been pretraining? could you have been pretraining? could they have been pretraining?

Interro-negative form

Simple form	V-ing form
couldn't I pretrain? couldn't you pretrain? couldn't he pretrain? couldn't we pretrain? couldn't you pretrain? couldn't they pretrain?	couldn't I be pretraining? couldn't you be pretraining? couldn't he be pretraining? couldn't we be pretraining? couldn't you be pretraining? couldn't they be pretraining?
Perfect	V-ing perfect
couldn't I have pretrained? couldn't you have pretrained? couldn't he have pretrained? couldn't we have pretrained? couldn't you have pretrained? couldn't they have pretrained?	couldn't I have been pretraining? couldn't you have been pretraining? couldn't he have been pretraining? couldn't we have been pretraining? couldn't you have been pretraining? couldn't they have been pretraining?