Question

____(make) a living , his parents are made to work over 10 hours a day

Answer 1

答案：
(To make) a living , his parents are made to work over 10 hours a day.
这里用动词不定式做目的状语。
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追问

我不懂动词不定式，能解释吗

追答

动词不定式，基本形式就是：to +动词原形，
这种结构在英语中做状语时候，一般都是表示目的，
其实，上面那个句子，可以把动词不定式置于句尾，可能更加有利于理解，即：
His parents are made to work over 10 hours a day to make a living.
翻译：他的父母为了谋生，被迫每天工作10个小时以上。

这下你明白了吗？
欢迎交流。
请采纳，谢谢支持！

Answer 2

_To make___(make) a living , his parents are made to work over 10 hours a day
用不定式表示目的：为了养家糊口，他的父母每天不得不工作超过十个小时。

Answer 3

【To make】(make) a living , his parents are made to work over 10 hours a day