also
1.可以说He did not come, and she also did not come，但不可说He did not come, and she did not come also，这里的also该改作either。
2.also是副词，但也用作连接词。例如：I study English, also Russian. 在口语里时常有这种用法，有人认为用在文字里是不好的。可以在also前加上and。
3.注意下面第一句里用is，第二句里用are：
Not only the children but (also) their father is in town.
Not only the man but (also) his children are in town.
