English verb conjugation
CAN PROOFREAD

Irregular verb: proofread - proofread - proofread

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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