通常身在台湾的人说： “We live in Taiwan.” (来源：英语杂志 http://www.EnglishCN.com)

身不在台湾的人说：     “They live on Taiwan.”

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always vs. never

always & never 均为频率副词 (adverbs of frequency)，我们用百分比来细分它们的差异：

always—100% all of the time

usually—80% most of the time

often—50% much of the time

sometimes—30% some of the time

seldom—almost never

never—not at any time

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everyday vs. every day

everyday 是形容词
例如：everyday life, everyday dialogue, everyday clothes(便服), etc.
            She wears everyday clothes every day after retirement.
            He practices everyday English dialogue with his brother every day.
every day 是副词词组或名词词组在句子中作副词用
例如：He goes to the park for a walk every day.( 副词词组)
            Generally speaking, every day is a fine day in summer. (名词词组)

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eat one’s words vs. break one’s words

eat one’s words 失言，为说错话而道歉，承认自己的错误

例如：He ate his words at the meeting twice.

break one’s words 食言

例如：He never breaks his words. 他从不食言，他从不爽约。

 
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aim at vs. aim to

aim at  +  ving 企图，意欲，瞄准目标

例如：Henry aimed at passing the Joint College Entrance Examination.

aim  +  to企图，意欲，瞄准目标

例如：Henry aimed to pass the Joint College Entrance Examination.

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名词food一字是可数或不可数名词？

A. food 指食物通称时，是不可数名词，例如：food and drink(食物与饮料)。但指食物种类时是可数名词，例如：
1. Milk is a valuable food.
2. She eats the plainest of foods. (她吃最清淡的食物)

3. My students eat too many sweet foods, like cakes and pastry.

其它如health foods(各种保健食品)，baby foods (各种婴儿食品)等。