English verb conjugation
COULD PROOFREAD

Irregular verb: proofread - proofread - proofread

Affirmation

Simple form	V-ing form
I could proofread you could proofread she could proofread we could proofread you could proofread they could proofread	I could be proofreading you could be proofreading she could be proofreading we could be proofreading you could be proofreading they could be proofreading
Perfect	V-ing perfect
I could have proofread you could have proofread she could have proofread we could have proofread you could have proofread they could have proofread	I could have been proofreading you could have been proofreading she could have been proofreading we could have been proofreading you could have been proofreading they could have been proofreading

Negation

Simple form	V-ing form
I couldn't proofread you couldn't proofread she couldn't proofread we couldn't proofread you couldn't proofread they couldn't proofread	I couldn't be proofreading you couldn't be proofreading she couldn't be proofreading we couldn't be proofreading you couldn't be proofreading they couldn't be proofreading
Perfect	V-ing perfect
I couldn't have proofread you couldn't have proofread she couldn't have proofread we couldn't have proofread you couldn't have proofread they couldn't have proofread	I couldn't have been proofreading you couldn't have been proofreading she couldn't have been proofreading we couldn't have been proofreading you couldn't have been proofreading they couldn't have been proofreading

Interrogative form

Simple form	V-ing form
could I proofread? could you proofread? could she proofread? could we proofread? could you proofread? could they proofread?	could I be proofreading? could you be proofreading? could she be proofreading? could we be proofreading? could you be proofreading? could they be proofreading?
Perfect	V-ing perfect
could I have proofread? could you have proofread? could she have proofread? could we have proofread? could you have proofread? could they have proofread?	could I have been proofreading? could you have been proofreading? could she have been proofreading? could we have been proofreading? could you have been proofreading? could they have been proofreading?

Interro-negative form

Simple form	V-ing form
couldn't I proofread? couldn't you proofread? couldn't she proofread? couldn't we proofread? couldn't you proofread? couldn't they proofread?	couldn't I be proofreading? couldn't you be proofreading? couldn't she be proofreading? couldn't we be proofreading? couldn't you be proofreading? couldn't they be proofreading?
Perfect	V-ing perfect
couldn't I have proofread? couldn't you have proofread? couldn't she have proofread? couldn't we have proofread? couldn't you have proofread? couldn't they have proofread?	couldn't I have been proofreading? couldn't you have been proofreading? couldn't she have been proofreading? couldn't we have been proofreading? couldn't you have been proofreading? couldn't they have been proofreading?