为什么dancer.singer变动词形式.dancer去掉r而singer去掉er?为什么dancer.singer变动词形式.dancer去掉r而singer去掉er?

为什么dancer.singer变动词形式.dancer去掉r而singer去掉er?为什么dancer.singer变动词形式.dancer去掉r而singer去掉er? the singer and the dancer（）come to Beijing.为什么要选have,而不是are呢? The singer and dancer ( )from Beijing The singer and ____ has arrived alreadyA：dancer B：a dancer C：the dancer D：dancers a singer and dancer和the singer and dancer什么区别? The singer and dancer is to attend our evening .用is to 而不用are to 为什么 also a dancer and a singer和also dancer and singer有什么区别?还有有also a dancer and singer这一说还有有also a dancer and singer这一说么？ The singer and ________ has arrived already.最佳答案是什么?A：dancer B：a dancer C：the dancer D：dancers The singer and dancer——come a.is b.are c.has d.have 我知道选的是c可是为什么要选择c the singer and dancer ___the party this evening空格里填 is to attend 但为什么不能用 is about to attend 有什么不一样?错在哪里? 单项选择：The singer and dancer ____asked to perform agrin at the party last night. A.are B.were请告诉我为什么asked不用asking代替. dancer dancer dancer 英语连词语法1.She is a good dancer but a singer.2.You may do it yourself,or ask someone else to do it.为什么用“but”“or”两个连词,不用其他?1.应是：She is a good dancer but a poor singer The singer and dancer very young and smart A look B seemClooksDis seemingThe singer and dancer very young and smart.A look B seemClooksDis seeming I think she is either a singer( )a danI think she is either a singer( )a dancer the singer and dancer(is,are)come to our shool.应该选哪个啊?