...h可以省略之外,还有那些介词或者连词可以省略呢?as,since, because是否可以省略呢?比方说:Since weather permits, we can go outside playing
basketball.是否可以改成:Weather permitting, we can go outside playing
basketball.问题二:She stood at the street c...
...e boy smiles _______ the teacher praises him. A. when
B. while
C. as
D. since2. _______ he was sent to prison, the children were taken into care.
A. When
B. While
C. As
D. Since凭感觉应该是选when,但说不出理由,请老师指点!
...er backyard while dozens of birds flew down
to enjoy the food before them. 时态是否有问题?为什么主句使用了进行时,而while从句却使用了过去式?while从句是否也应该使用进行时即was flying:应该是
A smiling woman was throwing some grain into her backyard whil...
原文:I soon
learned to know this flower better. On the little prince's planet the flowers
had always been very simple. They had only one ring of petals; they took up no
room at all; they were a trouble to nobody. One morning they would appear in
the grass, and by night they would have faded peac...
我今天在语法网https://www.cpsenglish.com/question/38437上看到这样一道题:I
need one more stamp before my collection is 或者 has been completed.有的老师说is/has
been都可以,有的老师说只能is. 首先,关于在before从句中使用完成时和一般时的理解辨析...
...下去。这里的动词要用持续性动词。常与for(+时间段),since(+时间点)连用. Mary has been ill for three days.Mary has been ill since three days ago这种用法和现在完成进行时的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.的...