English verb conjugation
COULD PRETRAIN

Regular verb: pretrain - pretrained - pretrained

Affirmation

Simple form	V-ing form
I could pretrain you could pretrain she could pretrain we could pretrain you could pretrain they could pretrain	I could be pretraining you could be pretraining she 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 she 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 she 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 she 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 she 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 she 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 she 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 she pretrain? could we pretrain? could you pretrain? could they pretrain?	could I be pretraining? could you be pretraining? could she 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 she 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 she 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 she 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 she 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 she 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 she have been pretraining? couldn't we have been pretraining? couldn't you have been pretraining? couldn't they have been pretraining?