合口双元音表示口型有开到合拢,那么集中双元音中的“集中”二字如何理解?
To represent or speak of as contemptible small or unimportant; disparage请问as在这里是什么用法?
Where did your family get off to?where词性为连词或者副词,这句话中,where词性是什么?
1) I am finished.2) I have finished.句子1、2是否都正确?表达同一个意思?两句是否有差别?