括号中是修改处

1. Most college students are adults, they know what they want to do, what they should do(;) they want to get (encouraged) from families and friends, so, I think college students are able to decide their own (lives).

【评点】

标点：数个句子并列，如果话题改变，应该用分号。

get 是系动词，后面的表语需要用过去分词encouraged，意思是“受到鼓励”。如果想表示“得到鼓励（这种东西）”则需要把动词 encourage 改为名词 encouragement。

college students 是复数，life应该用复数 lives 表示“各自的生活”。

2. After they get married, they will understand how difficult (it is to) make a living (,) which is beneficial to their growth.

【评点】修改后的 how difficult (it is to) make a living which is beneficial to their growth 结构如下：

提前表语：how difficult

形式主语：it

系动词：is

真实主语：to make a living

非限制性定语从句：which is beneficial to their growth

3. But after they (graduate), many couples break up, there are many reasons for this phenomenon, (such as) economic factor, family factor (,) and so on.

【评点】

句子的时态立足于将来，时间状语 after 后需要用现在时 they graduate 表示将来；或者直接用介词短语 after graduation。

like表示“与…相像”，不能用来列举事例，应该改用 such as。

and so on 前要求用逗号。