高考英語語法的試題講解：虛擬語氣主語從句使用
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虛擬語氣用于主語從句中
在It is (was)important (necessary, desirable, imperative, advisable, incredible, urgent, possible, essential, natural, preferable, insistent, crucial, better, best, ridiculous, vital) that…能及It is (was) a pity (shame, wonder, must, suggestion, proposal, requirement, request, desire, order, recommendation) that….,It is (was)desired (arranged, decided, ordered, proposed, requested, recommended, suggested, settled) that…等句型的主語從句中，其謂語用“should+動詞原形(其中should可以省略)”來構成虛擬語氣。
例：It is important that we (should)speak politely.
我們說話要有禮貌，這是很重要的。
例：It is essential that she these application forms be sent back as early as possible.
將這些申請表格盡快地反饋回來是很必要的。
(責任編輯：郭峰)
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