第三单元的知识点是关于“动词的时态和语态”的内容。
具体包括以下几个方面：1. 时态：包括一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成时等。
2. 语态：包括主动语态和被动语态，其中被动语态的构成和用法需要特别注意。
3. 一些常见的动词短语：包括“be going to”、“have to”、“need to”、“would like to”等，这些短语在句子中的用法和意义也需要掌握。
总的来说，掌握好这些知识点对于英语学习和应用都非常重要，可以帮助我们更准确地表达自己的意思，也能更好地理解和阅读英语文章。
英语必修六 Unit three: A healthy life
1.与单元主题相关句子:
① Practice safe living habits.
② Give your body the energy it needs.
③ Be in a good mood.
④ An apple a day keeps the doctor away.
⑤ Early to bed and early to rise,makes man healthy, wealthy and wise.
⑥ The first wealth is healthy.
⑦ A light heart lives long.
2. Reading: Advice from grandad
重要词组:
under the tree （注意:在树下是用under）
at the end of 在……的尽头
keep fit 保持健康
become accustomed to对……习惯
manage to do something成功做某事
be taken off被开除
unless=if not 除非,如果不
Send sb. sth.=send sth. to sb.
do damage to sth.对……有害
句式及用法:
① It seems amazing that as my age I AM still fit enough to cycle 20 kilometers in an afternoon.
在这个句子中, It做形式主语, seem加形容词amazing作表语,that引导主语从句。
② I think (that）my long and active life （that/which）must be due to the healthy life I live.
第1个省略词that引导宾语从句。第2个省略词that/which引导定语从句,修饰life。
③ Your mother tells me that you started smoking some time ago and now you are finding it difficult to give it up.
tells me that中的that引导宾语从句。 finding it difficult中的it做形式宾语, difficult做宾语补足语。 give it up中的it是做真实宾语。
④ First,you can become physically addicted to nicotine, which is one of the hundreds of chemicals in cigarettes.
Which引导非限定从
⑤ But I did finally manage.
did表强调
⑥ Neither did I know that my cigarette smoke could affect the health of nonsmokers. 部分倒装
⑦ What I did know was that my girlfriend thought I smelt terrible.
what引导的主语从句作宾语, did表强调, that引导表语从句, I smelt terrible为宾语从句。
⑧ I knew it was time to quit smoking.
此句为省略了that的宾语从句。
quit doing sth.
It's high/about time that sb. did sth./should do sth. 是某人该做…的时候了（用虚拟语气）
⑨ I do hope so because I want you to live as long and healthy a life as I have.
a. do加动词原形表强调
b. as…as→否定式:not as/so…as
as+adj./adv.+as…
as+adj.+a/an+单数可数n.+as…
c. help sb.do sth.
