一、Reading
Some people eat to live, but there are others who live to eat. To live a long and healthy life, we must learn to have a balanced diet. A balanced diet simply means a bit of everything. A diet which includes meat, fish, vegetables and fruit is, of course, ideal. If you watch your diet, then you won't have to suffer the pain of going on a diet.
二、解析
■ Some people eat to live, but there are others who live to eat.
- 主：Some people
- 谓：eat
- 目状：to live,
- 连：but
- 表：there
- 系：are
- 主：others
- 定从：who live to eat.
- 关系词、主语：who
- 谓：live
- 目状：to eat.
■ To live a long and healthy life, we must learn to have a balanced diet.
- 目状：To live a long and healthy life,
- 虚词：To
- 谓动：live
- 定：a long and healthy
- 宾：life,
- 主：we
- 谓：must learn
- 宾：to have a balanced diet. （作名词短语使用）
- 虚词：To
- 谓动：have
- 定：a balanced
- 宾：diet.
live a ... life = lead a ... life：过着...的生活
（1）live 作不及物动词时，作“居住”解，之后接表场所的介词短语或副词。
（2）live 作及物动词时，表“过（某种）生活”之意，此时只能用 life（生活）作其宾语。
learn to + 动词原形：懂得...，学会...
learn 之后亦可接“how to + 动词原形”所形成的名词性短语作其宾语。
learn how to + 动词原形：学习如何...
■ A balanced diet simply means a bit of everything.
- 定：A balanced
- 主：diet
- 状：simply，等同 just
- 谓：means
- 定：a bit of
- 宾：everything.
simply：adv.简单地；就是
simply 表“就是”时，为了强调用法；在肯定句中，需置于被修饰的动词前；在否定句中，则置于助动词（如 don't、can't）之前。
mean：vt.意味；意欲
三态：mean、meant、meant
mean + n./that 引导的名从：指的是/意味着...
人 + mean + to + 动词原形=人 + intent + to + 动词原形：某人打算...
bit：n.有点，些许
a bit of + 名词：一点儿...（a bit of 在此处做形容词）
a bit + 形容词/副词：有一点...，稍微...（a bit 在此处作副词）
■ A diet which includes meat, fish, vegetables and fruit is, of course, ideal.
- 主：A diet
- 定从：which includes meat, fish, vegetables and fruit
- 关系词、主：which
- 谓：includes
- 宾：meat, fish, vegetables and fruit
- 系：is
- 状：of course,
- 表：ideal.
of course：当然
在本文中为插入语，置于 be 动词与补足语之间；本句亦可将 of course 置于句首。
■ If you watch your diet, then you won't have to suffer the pain of going on a diet.
- 条状从：If you watch your diet,
- 引导词：If
- 主：you
- 谓：watch
- 宾：your diet,
- 时态：一般将来时
- 状：then
- 主：you
- 谓：won't have
- 宾：to suffer the pain
- 虚词：to
- 谓动：suffer
- 宾：the pain
- 定：of going on a diet.
suffer：vt.遭受
suffer the pain of：遭受...之苦
go on a diet：节食，照规定饮食
be on a diet：在节食中
三、语法
（1）不定式短语作状语的用法。
详见教材讲解。