pp:动词的过去分词一般现在时:am/is/are+pp一般过去时:was/were+pp一般将来时:will be+pp或be going to be+pp现在进行时:am/is/are+being+pp过去进行时:was/were+being+pp现在完成时:have/has+been+pp过去完成时:had+been+pp情态动词+V-原(动词原型):情态动词+be+ppought to(应该,等于should):ought...
介词后的动词要用动名词，故无论是被动语态还是完成体都要用动名词形式，所以be 和 have分别用being和...
11．过去完成进行时 He had been cleaning the blackboard. The blackboard had cleaned by him.（The blackboard was being cleaned by him.）12．将来完成进行时He will have been cleaning the blackboard. The blackboard will have been cleaned by him.（The blackboard will be being clean...
have been的本质，是be动词的完成式，传统语法解释为：be动词的“现在完成时”语法结构，与中文意义近似...
We agree with and have written extensively about this, but Melissa’s story reminds us too that sometimes children are embedded in systems that are so destructive to their well-being that they must, for their survival, find themselves un-nested. Melissa represents the child whose family is so...
Since the passage of The Dietary Supplement Health and Education Act in 1994, there has been a flood of new "dietary" supplements promoting anti-aging bene... CE Broeder,J, Quindry,K, Brittingham,... 被引量: 0发表: 2019年 Predictors of Treatment Adequacy During Evidence-Based Psychotherapy...
—Thedoctorknewthathisproblemhadbeenknownbyhim.have与havegot区别各种时态的被动情况:一般现在时:一般过去时:现在进行时:过去进行时:现在完成时:过去完成时:一般将来时:过去将来时:情态动词变被动:am/is/aredonewas/weredoneam/is/arebeingdonewas/werebeingdonehave/hasbeendonehadbeendoneshall/willbedonebegoing...
In addition, multiple HPV infections have been linked to increasing severity of SIL [29]. Despite creating a broad categorization of SIL by pooling LSIL and HSIL, SIL prevalence was the same in those with many (5–11) HR-HPVs as compared to those with very few (0–1) HR-HPVs. After...
In recent decades China has experienced an extremely rapid fertility reduction from more than six children per woman in the early 1960s to just over 1.6 children per woman in 2005 (Fig. 3.1). This fertility transition has resulted since the 1980s in significantly more boys being born each yea...
if information has been obtained from the Internet and the intervention has not worked for some reason, he feels he is knowledgeable and smart enough to be able to go to other sites or apps to get more information and alternative solutions to deal with his problem. It is only when that al...