“走路”上班是by foot，還是on foot？

3 　Helen is not worried about the exam; it was a piece of a cake for her.（海倫并不擔(dān)心考試，對她來說，那根本不算什么。）

4 　In response to the environmental protection, I go to work by foot every day.（為響應(yīng)環(huán)保，我每天走路上班。）

5 　Jenny had to fill in a team member who was ill.（珍妮必須接替一位病假同事的工作。）

正確用法

1 　It wasn't easy to move a big refrigerator, but my brother gave me a hand .

give someone a hand是一個慣用語，用在對方獨(dú)力完成某事有困難而助他一臂之力時。若是將冠詞a換成所有格his / her / my…，整句話就變成了血腥的大白話——把手給了對方！

2 　I don't want to chat with Sally because she loves to split hairs .

split hairs是指在細(xì)枝末節(jié)的問題上做不必要的爭辯。如果使用不可數(shù)的hair，指的是頭上的頭發(fā)，句義就變成莎莉愛“劈頭發(fā)”。

3 　Helen is not worried about the exam; it was a piece of cake for her.

a piece of cake這個俗語是指一件事很容易辦成；若是在cake前面多加了冠詞a，就真的是指“一塊蛋糕”了。

4 　In response to the environmental protection, I go to work on foot every day.

表達(dá)走路或步行，應(yīng)該用on foot；by foot不合語法，而且硬要解釋的話，會變成“搭乘腳丫子”去上班。

5 　Jenny had to fill in for a team member who was ill.

fill in for someone是暫時替代某人工作的意思，如果少了for，整句話的意思就變成珍妮要去“填滿”這位生病的同事。