请分别说出essential 与 recommend 两个词的所有用法.

一、essential
形容词 a.
1.必要的,不可缺的[(+to/for)]
Hard work is essential to success.
成功必须努力工作.
2.本质的,实质的;基本的[B]
There is no essential difference between the two drafts.
两份草稿没有本质上的不同.
3.提炼的,精华的
名词 n.[P]
1.要素,要点;必需品
Our course deals with the essentials of management.
我们的课程讲述管理的基本要点.
2.本质,实质
二、recommend
1..推荐,介绍[(+as/for)][O1]
2.建议,劝告[O2][+v-ing][+that]
3.使成为可取,使受欢迎[(+to)]His proposal has much to recommend it.
4.付托,托付[(+to)]I recommended my child to her care.