1 such 和so 老师说so +形容词加名词单数比如so a beautiful girl但我感觉不太对啊,我原来记

1.应该说so beautiful a girl或者such a beautiful girl
2.the number of the students in our class is 55 and there are a number of students are girls.
这个是错误的
前句The number of the students in our class is 55 我们班有55名学生 这个是对的
后面and并列句 there are a number of students are girls 有两个谓语是错误的
有一些是女生,或者可以这么直接表达：a number of students are girls
整句就是：The number of the students in our class is 55 and a number of students are girls.
3.是在元音前加an
award[ə'wɔ:d] 发音是元音,用an
an award
4.end也可以做名词,表示末端,尽头 the end of 是可以的
5.应该不可以
比如：I was cooking in the kitchen when someone knocked at the door. 我正在厨房做饭,这时有人敲门.主句中可以用进行时 when做并列连词,意为“在那时,届时”,表示时间.
while可以主句和从句都用进行时