He can't understand the math problem.
Can't he understand the math problem?
You should wash up before dinner.
Should you wash up before dinner?
She didn't bring money with her.
Didn't she bring money with her?
We should take our umbrellas
Should we take our umbrellas?
The dog could play with the cat.
Could the dog play with the cat?
The train will arrive on this track.
Will the train arrive on this track?
They didn't follow our directions.
Didn't they follow our directions?
We couldn't agree on anything.
Couldn't we agree on anything?
She doesn't have red hair.
Doesn't she have red hair?
