英文好的.present perfect continuous tense.我想不到来造句啊==谁可以帮我一下//、ha

the babies have been crying for two hours
she has been cleaning since yesterday
i have been walking on the streets for months
they have been trying to find the lost dog for weeks.
she has been doing her homework since today morning

Stop please, you have been crying for 1 hour.
Jill has been cleaning the room since 8 a.m.
We have been walking the whole morning and my feet hurt a lot.
I have been trying to solve the problem but up till now I still don't have any idea.
The boy has been doing his homework quietly since he came back from school.

The little boy has been crying for half an hour.
He has been cleaning the house for 10 minutes.
They have been walking along the road for 3 miles.
They have been trying to get the kite back from the tree for half of the day.
He has been doing homework all the afternoon.

The twins have been crying for more than an hour.
She has been cleaning the house since this morning.
I have been walking after school is over.
They have been trying to work out the math problem for almost three years.
He has been doing a good job after he attended the training class.

The babies in the room have been crying for more than two hours.
She has been cleaning the room since all the night.
I have been walking after supper.
They have been trying solving the problem in different ways.
She has been doing good deeds since she heard the story of Lei Feng.