1. in a low = side by side 成横排地　　 in a line = one behind the other 成纵队地　 a row of 一横排 a line of 一纵排

7. catch up with sb 追赶某人　　　　 a number 16 bus = a No 16 bus

Lesson 23

6. catch a bus to…= take a bus to…= go to …by bus 乘车去…　 Let’s catch a bus to the shop .

5. had better + do sth　 最好做…　 否定：had better + not do sth　 (没有人称、事态和数的变化)

4. take the + 序数词+turning on the left / right = turn left / right at the + 序数词+ turning / crossing .

3. ask …for … 向…要…　 He asks me for help .　　　 along 沿着… There are some trees along the roadside .

2. need + 名词 / to do sth――实义动词　 I need a pen . I need to buy some sugar .　 need + do(动原形)――情态动词

1. on one’s way to +地点名词 / +there, here, home(省to) / +to do sth 做…　　 in the way 挡路

5.　　　 similar 相象的，似的，后接to .　 Picture 1 is similar to picture 2 .

Lesson 22

4.　　　 between …and… 两者之间　　 among 三者之间　　　　 all the same 仍然