I won't tell the student the answer to the math problem until he ____on it for more than an hour.A has been workingB will have been working选B可以这样理解啊,直到他将要在这个问题上思考一个多小时
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![I won't tell the student the answer to the math problem until he ____on it for more than an hour.A has been workingB will have been working选B可以这样理解啊,直到他将要在这个问题上思考一个多小时](/uploads/image/z/10687038-6-8.jpg?t=I+won%27t+tell+the+student+the+answer+to+the+math+problem+until+he+____on+it+for+more+than+an+hour.A+has+been+workingB+will+have+been+working%E9%80%89B%E5%8F%AF%E4%BB%A5%E8%BF%99%E6%A0%B7%E7%90%86%E8%A7%A3%E5%95%8A%2C%E7%9B%B4%E5%88%B0%E4%BB%96%E5%B0%86%E8%A6%81%E5%9C%A8%E8%BF%99%E4%B8%AA%E9%97%AE%E9%A2%98%E4%B8%8A%E6%80%9D%E8%80%83%E4%B8%80%E4%B8%AA%E5%A4%9A%E5%B0%8F%E6%97%B6)
I won't tell the student the answer to the math problem until he ____on it for more than an hour.A has been workingB will have been working选B可以这样理解啊,直到他将要在这个问题上思考一个多小时
I won't tell the student the answer to the math problem until he ____on it for more than an hour.
A has been working
B will have been working
选B可以这样理解啊,直到他将要在这个问题上思考一个多小时
I won't tell the student the answer to the math problem until he ____on it for more than an hour.A has been workingB will have been working选B可以这样理解啊,直到他将要在这个问题上思考一个多小时
选A.这涉及到主将从现的问题
主句将来时从句现在时或现在完成时不能同时用将来时
B的话就是说 学生如果想要自己思考一个小时 那你就会在他开始思考之前告诉他答案
A就是学生思考了一个小时之后 你才告诉他答案
aaaaaaa选A
这句话应该是直到一个多小时后他还没有想出来,我才会告诉学生这道数学题的答案。表示的是影响应该是完成时,而不是进行完成时!更何况前面有了后面从句应该是一般现在时吧!
答案选A has been working
现在完成进行时,是英语中,动词的一种基本时态,其构成为:主语+助动词(have/has)+been+动词的现在分词+其他成分。其表达的意思有两种:表示从过去某时开始一直持续到现在的动作,并且还将持续下去;表示在说话时刻之前到现在正在进行的动作。...
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答案选A has been working
现在完成进行时,是英语中,动词的一种基本时态,其构成为:主语+助动词(have/has)+been+动词的现在分词+其他成分。其表达的意思有两种:表示从过去某时开始一直持续到现在的动作,并且还将持续下去;表示在说话时刻之前到现在正在进行的动作。
收起
B是从现在开始等他想半个小时之后就告诉他,,,(不管他想不想的出)
A是反正要让他自己已经想半个小时后 还想不出 就告诉他。。。
以我看这题的意思是让你选A
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