It took me five hours to do the homework.
例如我花了五小时作功课就是。
At home, not now, do the homework we've done in class.
不是现在，在家里，完成我们课上做的作业。
David told his son to do the homework.
大卫要他的儿子去做作业。
He asked me how to do the homework.
他问我怎么做作业。
You do the homework only half.
你做的作业只有一半。