has been trying
現(xiàn)在完成進(jìn)行時(shí)
如不明白請(qǐng)追問(wèn),如果滿意請(qǐng)【采納】
祝學(xué)習(xí)進(jìn)步現(xiàn)在完成進(jìn)行時(shí)知道。 為什么要那么用。首先, 英語(yǔ)中沒(méi)有has trying這一動(dòng)詞形式這里用這個(gè)時(shí)態(tài),表示這位技術(shù)員一直以來(lái)就在努力這么做好像是沒(méi)有have trying 哈 、看錯(cuò)了。不客氣
The technician __ to find out what is wrong with the generator.
The technician __ to find out what is wrong with the generator.
has trying has been trying
has trying has been trying
英語(yǔ)人氣:884 ℃時(shí)間:2019-11-18 05:48:51
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