建議祈使句
句型［Let us/ Let's或Let+第三人稱賓語(yǔ)+動(dòng)詞原形+其他］
1. Let us know the time of your arrival. 2. Oh, do let us be friends.
3. "Let's go."-"yes, let's go." 4. Let's start early, shall we?
5. "Shall he come in?"-"let him wait!" 6. Let him have his say.
7. "Nature and Nature's laws lay hid in night, god said 'Let Newton be' and all was light.'
[注] let可用于句型55，如：Let me see. "Let me alone." "Please let me into the house."
句型［Let+賓語(yǔ)+not }+動(dòng)詞原形+其他］［Don't let+賓語(yǔ)+動(dòng)詞原形+其他］
1. Let us not go. 2. Let's not waste out time arguing about it. 3. Let's not discuss it in class.
4. Don't let the fire out. 5. Don't let the children come near the edge.
6. Pray (please) don't let us be splitting hairs…, or there'll never be an end of the cause.
[注1] 古英語(yǔ)中可采用 "Let not+賓語(yǔ)…"的形式，如：1. Let not success elate you. (=you should not be elated by success.) 2. Let not failure deject you
[注2] 以上三種否定式不可用于間接引語(yǔ)中，如：（誤）Tell him don't let the fire out.
（誤）Tell him let the fire not out. （誤）Tell him let not the fire out. （正）Tell him not to let the fire out.
句型［Suppose/Supposing+主語(yǔ)+謂語(yǔ)（動(dòng)詞原形、過(guò)去時(shí)）+其他］
1. Suppose you ring me up. 2. Supposing we go for a swim.
3. Suppose (Supposing) we try to do it my way. 4. Supposing we looked (look) him up today.
句型［主語(yǔ)+had better+動(dòng)詞原形+其他］
1. We'd better start early. (=It would be better for us to start early.)
2. You'd better do as the doctor says and stay in bed.
3. You had better go to the fields and have a look. 4. Hadn't you better take an umbrella?
[注] 相當(dāng)于本句型的還有以下二式：1. "…would be well+不定式…" It would be well to start early.
2. "…may as well+原形動(dòng)詞…" We may as well go.
[附注] 建議祈使句還可以用以下動(dòng)詞來(lái)表達(dá)
1）allow, 如：Allow me, Sir, to introduce you to my fellow-travelers.
Pray allow me to detain you for a moment..
2) permit, 多用于正式場(chǎng)合，如：Permit me to explain further.
Please permit me, on behalf of our school, to extend my heartfelt greetings to you.
其次，也可用陳述句來(lái)表達(dá)這種概念。如：You have to knock before you enter my room.
1. You are not to come into my room without knocking.
2. You ought to show honor to your teachers. 3. We should be the masters of Science.
4. You are to write your name at the top of each sheet of paper.
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