she can sing many songs中为什么主语是第三人称单数而sing后面却没有加s呢?

she can sing改为( ) can she ( ) she can sing many songs中为什么主语是第三人称单数而sing后面却没有加s呢? Linda likes singing _____(and,so,)she can sing quite well. amy can sing many english songs now 改为过去时态 amy [] []many english songs when she []only five I can hear so many birds sing这句话对不对?hear后是宾语从句吗?还是改为I can hear so many birds singing 把句子改为过去时态Amy can sing many English songs now Amy ( ) ( )many English songs when she ( )only fivecoud sing是过去时态的吗 阅读填词 Amy is a music fan.She loves any music.She can play the piano and violin very w_1_And she can sing many k_2_of songs:country music,rock music,pop music,and even classical music.So she watches CCTV3 a lot and never m_3_any concerts.On New She can sing and dance (对sing and dance提问) she can sing and dance 否定句 she can sing english songs b-- SHE CAN SING WELL. [变否定句】 She can'tt ___(sing)American songs Can she sing?还有怎么回答 she can sing the songs 什么 (beautiful) She can sing songs_______（beautiful） Yes,I like ( )and I can sing many many songs She can ___,but she can’t ____ very well.A.sings,sing B.sing,to sing C.singing,sing D.sing,sing,如果可以请写出原因 Mary can't (r ) the English text ,so she has to read it many times