導語：英語的句式多彩多姿，同一個意思可以透過不同句型反映出來。現在讓我們看看兩種出現率很高的句式，即條件句和讓步句。
㈠由條件副詞分句表達，如：
① If you go out in the rain, you will get wet.
② Unless a person tries hard, he won't succeed.
③ In case I forget about the meeting, please remind me.
④ He will be allowed to do it on condition that he abides by all the rules and regulations.
條件副詞分句裏的.連詞“if”，在某些情況下可以省略，但句子要倒裝，如：
⑤ Should it rain tomorrow/ If it should rain tomorrow, I shall not go out.
⑥ Had you worked harder/ If you had worked harder, you would have made it.
㈡由複合介詞“in case of/ in the event of”引導的條件副詞詞組表達，如：
⑦ In case of fire, call the fire brigade.
⑧ In the event of an emergency, call up the police.
㈢由連詞“supposing/ provided”引薦的分句表達，如：
⑨ Supposing (that) the matter was true, what would you say ?
⑩ I will lend you my car provided (that) you take good care of it.
㈣由“but for/ but that”引薦的詞組或分句表達，如：
● But for your timely help, we would have been in hot water.
● But that Tom is sick, he would be here today.
㈤由祈使句表達，如：
● Work hard and you will succeed.
現在來看看讓步句的表達法。⑴由讓步副詞分句表達，如：
● Although he is rich, he is not happy.
● Though Jim is learned, he lacks experience.
⑵由副詞“however”構成的分句表達，如：
● However hard you may try, you will not get the job.
● We will have to finish the job, however long it takes.
⑶ 由代名詞“whatever/ whoever”等表達，如：
● Some students refused to work whatever the teacher might say.
● She won't care whoever he is.
⑷由介詞“despite”或複合介詞“in spite of”引薦的讓步副詞詞組表達，如：
● Despite being tired, some students went on studying until late at night.
● In spite of illness, David came to work.
⑸通過“no matter how/ no matter what”所構成的分句表達，如：
● No matter how cold it is, Helen always goes swimming.
● No matter what they did, their boss was not pleased.
