八年級英語上冊第二單元知識點（2018新版人教版）
i think i’m kind of unhealthy.我想我有點不健康。
55.on weekends在周末
56.ask sb. about sth.就某事詢問某人
57.by doing sth.通過做某事
58.go online去上網
59.the answer to the question問題的答案
60.stay up late熬夜
61.the best way to do sth.做某事的最好方式
62.at least twice a week一周至少2次
63.such as 比如；諸如
64.less than少于《----》more than多于
65.hardly ever幾乎從不
66.swing dance搖擺舞
67.go to bed early早點睡覺
68.in one’s free time在某人的業余時間
69.help with housework幫忙做家務
70.old habits die hard積習難改
71.play tennis打網球
72.have dance and piano lessons上舞蹈課和鋼琴課
73.go shopping=do some shopping購物
74.spend time with sb.和某人一起度過時光
75.spend time/money on sth.在某方面花費時間或金錢
76.spend time/money (in) doing sth.花費時間或金錢做某事
77.sometimes=at times有時
78.help with housework幫助做家務
二、重點句子：
1.how often do you exercise? 你（你們）多久鍛煉一次身體？
解析：how often + 助動詞do(does或did) + 主語 + do sth.?
疑問詞how often是問頻率(多久一次),（在這里助動詞do(does或did) 是起幫助構成疑問的作用）與一般現在時或一般過去時連用，回答一般是用表示頻率的副詞，如：once, twice, three times…, sometimes, often, quite, often, never, every day, once a week , twice a month , three times a month , three or four times a month等。
eg1)——how often do you go to the factory?
——twice a week.你們多久到工廠去一次？每星期兩次。
eg2)——how often does he go shopping?
——he goes shopping once a month.
2.——“what do you usually do on weekends?”
——“ i usually play soccer.”“周末你通常做什么？”“我通常踢足球。”
解析：第一個do為助動詞, 在這起幫助構成疑問的作用；而第二個do則是實義動詞。
eg1)what do you usually do on weekends? i often go to the movies.
eg2)what does she usually do on weekends? she sometimes go hiking.
3.——“what’s your favorite program?”
——“it’s animal world.”“你最喜歡什么節目？”“動物世界。”
4.as for homework , most students do homework every day .
解析：as for...意思是“至于；關于”，常用于句首作狀語，其后跟名詞、代詞或動詞的-ing形式（即動名詞）。
如：as for him，i never want to see him here. 至于他，我永遠不希望在這里見到。
as for the story，you'd better not believe it. 關于那故事，你最好不要相信。
as for myself, i don’t want to go now. 至于我自己，我現在不想去。
as for the man, i know nothing about him. 至于那個人，我什么都不知道。
5. mom wants me to get up at 6:00 and play ping-pong with her .
解析：want to do sth. 意思是“想要做某事”；
want sb. to do sth.意思是“想要某人做某事”。如：
eg1)do you want to go to the movies with me？你想和我一起去看電影嗎？