It's your turn to cook dinner.

该你做饭了。

I have to go and cook dinner.

我要去做饭了。

It's his turn to cook dinner, but I bet he'll try to duck out of it.

轮到他做晚饭了，但我敢打赌他会想方设法逃避的。

I helped my mother cook dinner.

我帮忙我的母亲煮晚餐。

Do you have to cook dinner?

你必须做晚饭吗？