¸ß¿¼Ó¢ÓǰÄѵãÖØµã´óÅ̵ã
¸ß¿¼Ç°ÄѵãÖØµã´óÅ̵ã(Ò»)
Ò»£®IT¾äÐÍ
1.It +be + Ò»¶Îʱ¼ä +before ´Ó¾ä 2.It + be+ Ò»¶Îʱ¼ä + since´Ó¾ä
3.It + be+ ʱ¼ä + when´Ó¾ä 4.It + be+ Ç¿µ÷²¿·Ö + that´Ó¾ä
×¢Òâ:It was at this shop that you bought the watch, wasn’t it ?

ÈÕÓï
º«Óï
·¨Óï
µÂÓï
Î÷°àÑÀÓï
Òâ´óÀûÓï
°¢À²®Óï
ÆÏÌÑÑÀÓï
Ô½ÄÏÓï
¶íÓï
·ÒÀ¼Óï
Ì©Óï


