It is necessary to study harder.
it is necessary to do sth
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相关问题
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It is not necessary to do sth enjoy doing sth I like to have
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小语法!be necessary to do sth还是be necessary do sth
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it is adj to do sth和it is adj doing sth
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it is helpful to do sth it is helpful for doing sth it is he
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是it is time to do sth还是 it is the time to do sth
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是it is time to do sth还是 it is the time to do sth
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it difficult to do sth 和it is difficult to do sth 的区别
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It is adj.of sb.to do sth.和 It is adj.for sb.to do sth.
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It is fun?到底是It is fun to do sth 还是It is fun doing sth?It is
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it is +名词+to do sth,it is+名词+doing sth 与it is +名词+done的区别