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最佳答案：现在完成时专项训练一、单项选择1. Li Hong has ________ the army for 2 years.A. joined B. joined
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最佳答案：一般现在时(1) 一般现在时表示经常性的动作或状态 一般现在时表示经常性动作或状态时,常与often,always,usually,sometimes,ever
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最佳答案：has livedhave beencomedpassed ;lefthas lost;have seenhave findhave hadhave retur
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最佳答案：就是joined希望能帮到你，望采纳！
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最佳答案：1 I have__never___met him before,so I have no idea about him.2 Jack has__already
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最佳答案：Mother has not cooked the dinner and cleaned the kitchen.这个是否定式Has mother cooked
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最佳答案：你一个问问题的人，连题目都懒得打出来，基本上没人会帮你翻书去回答问题的。更何况根本没有你说的那书。
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最佳答案：The old man died last year.==== The old man has been dead for a year.
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最佳答案：Last week,选A.since 后面跟一般过去式,前不加定冠词.
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最佳答案：10.has been open 11.How many times have ,cleaned 12.has been to ,twice 13.has be