八年级上册英语知识点：第一单元。
句型。1.疑问词how的用法。
1)怎样，用什么手段，方法/交通工具how are you? /how is she?
how did he do it? /i don’t know how to do you come to school?
2)情况如何(指身体健康状况) how are you?(3) how many，how much表示多少其中how much还可以表示钱数。
how many后接可数名词复数，how much接不可数名词。
how many times do you go to the park?how many pens do you want?
how much water do we drink every day?how much are those pants?
4) how often是对动作发生的“次数”提问，询问的是频率“多久一次”
回答可以是：every day. /once a week. /threetimes a week. /often. /
how often do you play tennis?how often do you surf the internet?
5)howold?询问年龄howoldareyou?iamfive.
(6)howabout?，如何？，怎么样？
howaboutgoingto the movies?
2. time表示不可数名词，意为“时间”。表示可数名词，意为“次数，倍数”what time is it?
i go to the movies three times a week.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 year2. exercise v.
/ n. shop v./ often exercises on weekends.
we often do / take exercise on often shop on weekends.
there are many shops in the neighborhood.4. as for意为“就，而论；至于”
as for fruit，i eat it sometimes.
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.
my mother wants me to drink it.我妈妈想要我喝。
want to do sth.想要做某事。
want sb. to do sth.想要某人干某事do you want to go to the movies with me?你想和我一起去看电影吗？
i want you to help me with my math.我想要你帮我学数学。
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. she says it’s good for my health.
她说它对我的健康有意。
be good for表示“对，有益(有好处)”其反义为：be bad for对，有害/无益it’s good for us to do more reading.多读书对我们有好处。
drinking milk is good for your health.
reading english is good for studying english.对英语对学习英语有益/有帮助。reading in bed is bad for your eyes.
在床上读书对你的眼睛有害。
7. usually when i come home from school通常是在我从学校回家时when +从句当，时候。
i often stay at home when it is rainy.8. i try to eat a lot of vegetables.
try to dosth.尽量/尽力做某事。
i’ll try to learn english well. 我会尽量尝试学好英语的。
you must try to take more exercise.你必须尽量多做运动。
9. i look after my health. look after照顾我的弟弟病了。我今天不得不照顾他。
all the students must look after the desks andchairs.
有的学生必须照看好课桌椅。
he often helps his mother look after his littlesister.
他经常帮助他的妈妈照顾他的小弟弟。10. my healthy lifestyle helps me get goodgrades.
我健康的生活方式帮助我取得好的成绩。help sb.(to) do sth.帮助某人做某事。
she often helps me learn math.她经常帮助我学数学。
11. good food and exercise help me to studybetter.
好的食物和运动帮助我学习得更好。help sb. (to) do sth.
帮助某人做某事12. is her lifestyle the same as yours ordifferent?
is her lifestyle the same as your lifestyle oris her lifestyle different from your lifestyle?
她的生活方式和你的一样或是不同？
be the same as / be different from与，一样/与，不同。
she looks the same as her sister.她看起来跟她的妹妹很像。
this book is different from that one.这本书跟那本书不一样。
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