? asked in 教育與參考考試 · 1 decade ago

英文文法不懂

Before patients's blood pressure is measured in a doctor's office , ----- and

at rest 10 minutes appears to give more reliable results.

a.having them seated b.have them seated

那一個 為什麼

Update:

為什麼不用having?

1 Answer

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  • candy
    Lv 5
    1 decade ago
    Favorite Answer

    Before patients's blood pressure is measured in a doctor's office , ----- and at rest 10 minutes appears to give more reliable results.

    a.having them seated b.have them seated 答案是b.要用原形動詞have, have 在這裡同使役動詞let. 具有命令的口氣.

    Before patients’ blood pressure is measured in a doctor’s office, have them seated and at rest 10 minutes appears to give more reliable results. 在病人到醫生那兒量血壓之前,為了要得到更可靠的結果,讓他們坐下至少十分鐘.

    have them seated 是have+受詞+過去分詞, 具有命令的口氣,讓他們坐下=you must have them seat down.

    2009-09-16 11:57:22 補充:

    如果是 having them seated是現在分詞的構句, 通常是形容詞子句時才用.前面句子主詞是 patients' blood pressure , 而後面句子的主詞不一樣,不能用分詞構句.

    Source(s): candy 的知識
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