Unit 1 How often do you exercise?知识点
1. time 表示不可数名词，意为“时间”。
表示可数名词，意为“次数，倍数” 注意“次数”的表达方法：一次 once，两次 twice，三次或三次以上用基数词加上 times： three times, five times, one hundred times表示“……几次”的表达方法是：once a day/ a week/ a month/ a yeartwice a day/ a week/ a month/ a year 2.注意 sometimes 与几个形似的词的区别。(1) sometime 是副词，意为“在某个时候；某时”(2) some time 是名词词组，意为“一段时间”，做时间状语用(3) some times 是名词词组，意为“几次，几倍”(4) sometimes 是频度副词，意为“有时”
3．A lot of = lots of = many/ much 许多keep in good health = keep healthy = stay healthykeep + 形容词表保持某种状态 4. as for 意为“就……而论；至于”
As for him，I never want to see him here.至于他，我永远不希望在这里见到。 5.want to do sth. 想要做某事 want sb. to do sth. 想要某人干某事
有很多动词后面用这种结构做动词的复合宾语： ask sb. to do sth. 叫某人做某事 tell sb. to do sth. 告诉某人去做某事 help sb. (to) do sth. 帮助某人做某事6.be good for … 表示“对……有益（有好处）”；be bad for … 对……有害/无益7.When + 从句当……时候
8.try to do sth. 尽量/尽力做某事9.look after 照顾10. help sb.(to) do sth. 帮助某人做某事11. look（看起来）sound（听起来）smell（闻起来）taste（尝起来）feel（觉得）+adj. /+like+n. 12. be the same as … / be different from … 与……一样/与……不同13.kind of = a littlea kind of 一种14. maybe (adv.) = perhaps 也许，可能
. 15.although = though 虽然
