S + V + lest S (should) VR
→ S + V + for fear that S should/might VR
1 本句型在介紹表否定目的的句型「以免、唯恐」。老師可先介紹片語的用法：for fear of + V-ing; in order not to + VR; so as not to + VR; not to + VR...，然後再進入子句的用法lest...should...; for fear that...，最後可補充另一種基本的否定目的用法 so that + S + not...。
2 複習句型：for fear of + V-ing的用法
(1) S + V...for fear of + V-ing
為介詞片語的用法。
• We should be careful of what we say for fear of hurting others.
• We must pay close attention to traffic safety for fear of having accidents.
(2) S + V...in order not to + VR
為不定詞片語的用法。in order not to 可與 so as not to, not to 交換使用。
• The road being slippery, take care not to/in order not to/so as not to fall.
3 本課句型：
(1) S + V + lest S (should) VR
(2) S + V + for fear that + S + should/might VR
lest + S + (should) VR之句型在現代英文中已漸漸為for fear that取代。
• We whispered lest other people (should) hear what we were talking about.
• They placed a guard at the door, lest the prisoner (should) find a means of escape.
• We started early for fear that we should get caught in the traffic.
• The musician handled his instrument with great care for fear that it should be damaged.
4 補充句型①：so that + S + 否定動詞
S + V...so that/in order that + S + 否定動詞
本句型可以改寫成：
(1) lest + S + (should) VR
(2) for fear that + S + should/might VR
(3) so as not to + VR; in order not to + VR; not to + VR
• Many girls avoid eating sweets so that they may not gain weight.
→ Many girls avoid eating sweets lest they (should) gain weight.
→ Many girls avoid eating sweets for fear that they should/might gain weight.
→ Many girls avoid eating sweets so as not to gain weight.
• The speaker spoke very slowly and clearly so that the audience would not misunderstand him.
• Many students burn the midnight oil so that they will not fail the entrance exam.
5 補充句型 ②：in case + S + (should) VR...
(1) ...in case of + N
為片語用法。
(2) ...in case + S + (should) VR
可改寫成for fear that...。in case是「唯恐、以防（同lest）；萬一、假如（同if）」之意，作連接詞引導副詞子句，與should 並用，以修飾主要子句。in case
置於句首可當if 使用， 當作「萬一」解，後面則可接現在式或過去式。
• In case of an/any accident, schoolchildren should report it to the teacher right away.（假如）
• Take your umbrella with you in case it may/should rain.（以防）
• In case I am late, please start the meeting without me.（萬一）
(p. T-107)
• I stopped suddenly in case/lest/for fear that he (should) think that I was showing off.（唯恐）
補充練習
中翻英
1. 我把電話號碼寫下來，以免我忘了。（for fear）
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2. 多用功一點，以免你考試不及格。（lest）
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3. 他說了實話，以免受到更嚴厲的處罰。（in case）
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4. 我帶了把傘，唯恐下午會下雨。（lest）
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5. 我跑得很快，唯恐被這隻狗咬到。（for fear）
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參考答案：
1. I wrote down the phone number for fear that I should/might forget it.
2. Study harder lest you (should) fail the exam.
3. He told the truth in case he (should) get a more severe punishment.
4. I brought an umbrella with me lest it (should) rain this afternoon.
5. I ran very quickly for fear that I should/might be bitten by the dog.