12. ________ the letter, John left for the post office to mail it.
(A) Had written
(B) Having written
(C) Had been writing
(D) Have been writing
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統計: A(322), B(538), C(161), D(62), E(0) #694998
統計: A(322), B(538), C(161), D(62), E(0) #694998
詳解 (共 3 筆)
#1027970
應該是原本句子是After John had written the letter,he left for the post office to mail it.
由於主詞相同 所以可以省略 變成having written the letter,john left for the post office to mail it.
分詞構句
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#964077
having Vpp.在句首時,表示動作已經發生,並強調對主句的影響(通常是表示主句動作發生的原因)。
寫完信->去寄信,有因果關係,此句是分詞構句的句型。
前一句是從屬子句,後一句是主要子句,所以可以省略從屬子句的主詞John。在從屬子句中,表示主動或是進行的動詞改成現在分詞(ving),所以本句John have written the letter,改成 having written the letter.
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#963909
‘having + v-pp’ 表示兩句所表達的事情有明顯先後之別
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