高二英語Understanding each other教案
it is natural that a bird ___rest_________ (rest) in trees.
it is necessary that he ___be sent___________ (send) to beijing right away. 另外，下列結構中主語從句的謂語動詞也要求用虛擬語氣：
it is ordered that …(根據命令、要求……) , it is proposed that …(人們建議……)
it is desired that … (最好、需要……) , it is requested that … (人們要求……)
it is suggested that … (有人建議……) , it is recommended that …(有人推薦……)
it is demanded that …(根據要求……) ,等。例如：
it is suggested that the english evening _be held________ (hold) on saturday. 2)在賓語從句中
一個堅持，兩個命令，三個建議，四個要求。即1.insist 2. order, command 3. advise, suggest, propose 4. demand , require, request, desire這些動詞后面的賓語從句要使用虛擬語氣用法。即從句中的動詞使用should +v，或者將should省略。以上動詞相應的名詞構成的名詞性從句包括主語從句，表語從句和同位語也要使用虛擬語氣。(order, advice, suggestion, proposal, demand, request, desire)he proposed that we _set________ (set) a deadline for the complement of the plan .
they requested that we __send___________ (send) a delegation to their country.
i suggested that he ___set_______ (set) off for our headquarters straightaway .
注意：當insist表示“堅持說”、suggest表示“表明，顯示”時，不用虛擬語氣。 the look on his face suggested that he __was________ (be) quite satisfied with what i had done for him. he insisted that he _was__________ (be) honest. 3) 在表語從句和同位語從句中
名詞suggestion（建議）, proposal（提議）, order（命令）, recommendation（推薦），advice (建議) 等后面所接的表語從句和同位語從句中，謂語動詞要用"(should) + 動詞原形"：
my suggestion is that he __leave_______ (leave) for london at once .what do you think of his proposal that we __put_________ (put) on a play at the english evening? 4) 在狀語從句中
as if 、as though（似乎，仿佛）引出的方式狀語從句，如果表示真實情況應該用陳述語氣；如果表示非真實情況則應該用虛擬語氣, 過去用had done, 現在用did/were, 將來用would dothey are talking as if they __had been_________ (be) friends for years. the teacher treats the students as if they _were_________ (be) his own children.they are talking and talking as if they ____wouldn’t meet_____ (not meet) again5) 在it is (high) time that sb did/were sth從句中 "該是……的時候了", it is time that we __got______ (get) ready for the final examination.it is high time that we __had_______ (have) our lunch.6) 在if only/wish…從句中 "要是……就好了"、"但愿……" 過去：had done 現在：did/were 將來：would do