I have to do some washing.

我必须洗洗衣服。

I helped her (to) do some washing.

我帮她洗了些衣服。

She often helps her mother do some washing.

她常帮妈妈洗衣服。

If you do some washing, you can stay with us.

如果您做一些洗衣机，您可以和我们在一起。

Mr Green made his little daughter herself do some washing.

格林先生让他的小女儿自己洗衣服。