介詞（Preposition）可以用嚟配搭動詞、名詞、形容詞，例如 insist on/ advantage over/ good at，除此之外，亦都可以放喺一句短語嘅開頭。今日我哋準備咗幾個唔會好難背嘅語句，考 IELTS 時亦都有機會可以用得著㗎！
At:
1. At no time 絕對不會
She is the most punctual person I have ever met. At no time would she be late for work.
她是我見過最守時的人，上班絕對不會遲到。
2. At a loss 不知所措
I was at a loss when she told me to present instead of her. I have absolutely no idea about the project.
當她讓我代替她滙報時，我感到不知所措，在於我對這個項目完全不了解。
3. At the cost of sth 以某事作為代價
I finished my assignment today at the cost of eating nothing for the whole day.
我以一整天什麼也沒有吃為代價，在今天之內就完成了這份功課。
In:
1. In no time 很快地
I have not eaten since morning, therefore, I was gulping down and finished off two bowls of noodles in no time.
我從早上開始就沒有吃東西，所以很快地就吞了兩碗麵。
2. In turn 輪流
When we were in secondary school, we had to be the student on duty in turn.
上中學的時候，我們都要輪流當值日生。
3. In the honour of 為了紀念
An opening ceremony is going to take place on the coming Saturday, in the honour of the Olympics opening.
開幕式將於下週六舉行，為了紀念奧運會的開始。
4. In the course of 在…的過程中
In the course of cheerleading practice, I have understood the importance of teamwork.
在啦啦隊練習的過程中，我明白到團隊合作的重要性。
