有一定意义，表示说话人的语气或情态，但不能单独作谓语，只能和其他动词原形一起构成谓语，没有人称和数的变化。否定形式是在情态动词后面加上not。变一般疑问句要把情态动词提到句子的开头，即：情态动词+主语+动词原形+其他?
1.肯定句：He/She/I/We/They/You/Tom+情态动词can+动词原形.
2.否定句：He/She/I/We/They/You/Tom+情态动词can+not+动词原形
4. be good at(doing...)擅长于=do well in 在某方面做得好
be good with与…相处的好be good for对…有益
5. like to do sth.喜欢做某事like doing sth.
6. Let’s do sth.让我干…let/make sb.do sth.使某人做某事
7. write stories写故事
write to sb= write a letter to sb= write sb a letter
8.tell /speak/say/talk的用法
tell sb. sth 给某人讲某事=tell sth to sb 把某事告诉某人
tell sb. to do sth 告诉某人做某事
tell stories讲故事 =tell a story tell a lie撒谎
2)speak v. 主要是讲说话的能力，往往接语言speak English讲英语
talk to sb.和…交谈/talk with sb.和…交谈(指双方)
4)say往往接说话的内容eg.Our teacher says we should study hard.
9. make friends with sb.和…交朋友
10. play games with sb.和…做游戏
11. help sb. with sth.= help sb. (to) do sth.帮助某人做某事
12. call sb. at +电话号码 给某人打电话拨+号码
13. on /at the weekend 在周末 on weekends after school放学后
14.do Chinese kung fu 打中国功夫
16. sing very well 唱得好 That sounds good. 那听起来很好
17.English-speaking students 讲英语的学生
18. Students’ Sports Center学生运动中心
19.also /too/either
also/too用在肯定句,also 用于句中，too 用于句尾,either用于否定句句未eg. I am a student . He is a student,too. I am a student . He is also a student.
I am not a student . He is not a student, either.
20.and/or 连接两个并列成分 eg.I can sing and dance.(and用于肯定句)
I can’t sing or dance.(or用于否定句)
Can you sing or dance ?(or用于选择疑问句"或者")
21.at the old people’s home 在养老院
22. need to do sth需要干某事need sb. to do sth 需要某人干某事
23.wanted students for School show学校表演招聘学生
v.展示;给….看… show sb. Sth= show Sth to sb.给某人展示
24.teach v.教，讲授 teacher n.教师teach sb.English教某人英语
teach sb. sth .= teach sth to sb.教给某人某事=教某事给某人
teach sb.to do sth教给某人做某事
25.music n.音乐 musician n. 音乐家
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