D) 句型"It is/ has been……since"所使用的两种时态都正确。 例:It is/ has been 10 years since I last saw him.(从我上次见到他以来已经10年了。) E) 在"no sooner than"、"hardly/ scarcely ……when"、"before"、"prior to"等句型中,主句要求完成时。 例:I haven...
Among the children who had not been tricked, the majority were 18 to cooperate with the tester in learning a new skill, demonstrating that they trusted his leadership. 根据句子结构我们可以看出逗号之前是一个介词短语意为在所有没有被戏弄过的孩子里面,...
have (has) been to:去过某地(表示某人的一种经历),可以和once, twice, often, never, ever 连用。 have (has) gone to:去某地了(表示某人已经离开此地,在去某地的路途上或已在某地,所以一般来说此句型只用于第三人称),此句型不能与上述时间状语连用。 (1)He has gone...
But as reliance on the Web grows, there are signs that the question is getting more serious attention: Last month, a study published in CNS Spectrums claimed to be the first large-scale look at excessive Internet use. The American Psychiatric Assoc...
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