engage主要用法和短语如下：
vt&vi （使）从事/忙于...
engage (oneself) in (doing) sth = be engaged in (doing) sth 从事...；忙于...
如：He wants to engage (himeself) in foreign trade.
= He wants to be engaged in foreign trade.
他想要从事外贸工作。
vt.使订婚
engage oneself to sb = be engaged to sb 和...订婚
如：My daughter was engaged to a young teacher.
我女儿和一位年轻老师订婚了。