2. be of +抽象名词＝be + adj. be of (great) + use/help/value/importance =be (very) + useful/helpful/valuable/important

4. 只能接-ing分词作宾语的动词(巧记) (1)建议冒险去献身，忍受期待不停顿；(2)I make a red saver camp.每个字母代表一个单词。 　　 放弃延期悔失去，坚持欣赏实践成； 　　 注意原谅避反对，考虑要求不自禁； 　　 允许习惯不介意，价值开始想动名。 它们所对应的动词或词组分别是：advise, suggest, risk, devote oneself to; have/bear/stand(忍受), look forward to, stop, give up, delay, put off, regret, miss; keep (on)/insist on/stick to, enjoy/appreciate, feel like, practice, finish; pay attention to, excuse, escape, avoid, object to; consider, require, cannot help, forbid; permit, be/get used to, mind; be worth, set about, imagine.

3. 非谓语动词的选择原则：(1)与逻辑主语之间的关系：主谓或动宾；(2)与主谓语动词的时间关系：①在主谓语之前一般用完成式；②与主谓语同时发生一般用现在分词；③在主谓语之后一般用不定式。

2. 不定式和分词作状语的比较

注：不定式和分词都可作结果状语，但用法和意义不同。不定式常和only, never连用，强调意想不到的结果和失望的情绪；而分词往往与主句有因果关系，主句表原因，分词形式表结果。

10. make/carry out/perform/do experiment 　 by experiment 　 experiment on/upon…：对…进行实验

9.　 pay for sth pay sb for sth pay sb money for sth=pay money to sb for sth pay off：全部还清 pay back：偿还，归还；报复

8. be (well) worth + n./doing sth be worthy + of+n. be worthy + of+being done be worthy + to be done

7. call on sb=drop in on sb call at a place=drop in at a place visit +sb/a place pay a visit to a place

6. attend school/church attend the meeting/lecture join party/league/club/sb join in the party/activity