Unit 1 How often do you exercise？
7) good food and exercise 好的飲食和鍛煉幫助我學(xué)得更好。
幫助某人做某事
8) be good for be good at =do well in be good to sb.
9) 和…相同 與……不同
不同: (n.)difference .there are many (不同點)between the two pictures.
10) although雖然，盡管,引導(dǎo)讓步狀語從句，與 同義，
但不能與 同時出現(xiàn)在一個復(fù)合句中，可與still, yet同用。
11) 保持健康： = be in good health =keep/ be healthy
4.拓展創(chuàng)新 注意sometimes與幾個形似的詞的區(qū)別。
a.sometime是副詞，意為“在某個時候”，“某時” b. sometimes:有時候是副詞。
c.some time是名詞詞組，意為“一段時間”，做時間狀語用
d. some times是名詞詞組，意為“幾次，幾倍”。
eg：（1）i met him in the street last month.
(2) will you come again next week?
(3) i will stay here for
(4) i watch tv on weekends.