Helping verb: could

Biff could not sleep.

• Biff

• could

• not

• did

• sleep

Biff could not sleep.

• Biff sleeps.

• Biff slept.

• Biff could slept.

• Biff could sleep.

Biff could not sleep.

• Biff

• could

• not

• sleep.

Biff could sleep in the tent.

• Did Biff could sleep in the tent?

• Did Biff sleep in the tent ?

• Could Biff sleep in the tent?

• Could not Biff sleep in the tent?

Could Biff sleep in the tent ?

• Yes, she could.

• Yes, she did.

• No, she could not.

• No, she did not.

Could Biff sleep in the tent ?

• Yes, she could.

• Yes, she did.

• No, she could not.

• No, she did not.

Dad told her stories.

• Dad

• told

• her

• did

• stories

Dad told her stories.

• Dad

• told

• her

• did

• stories

Dad told her stories.

• Could Dad tell her stories?

• Did Dad told her stories?

• Could Dad told her stories?

• Did Dad tell her stories?

Did Dad tell her stories?

• Yes, he could.

• Yes, he did.

• No, he could not.

• No, he did not.