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haven’t eaten anything for ten hours. I ha haven’t eaten anything since 6am. already :用于肯定句, 可放在助動(dòng)詞之后、過(guò)去分詞之前,也可放在句末. I have already finished my homework. yet: 用在疑問(wèn)句中意為”已經(jīng)”, 用在否定句中表示”還”, 常放在句末. Have you finished your homework yet? I haven’t finished my homework yet. ever: 曾經(jīng) 用于疑問(wèn)句中: Have you ever been to Beijing? Have you ever been to Shanghai ? 你去過(guò)上海嗎? never: 未曾 從未 I have never traveled by plane before. 我以前從來(lái)沒(méi)有乘飛機(jī)旅行過(guò).recently:最近 用于肯定 否定 疑問(wèn)句中 I have been busy recently. We have not seen Tom recently. Have they been here recently. eg: I have just seen Tom. I haven’t heard of it before. 我以前從來(lái)沒(méi)有聽(tīng)說(shuō)過(guò)這件事. They have planted 2000 trees so far. The child has learned 100 E