not only … but also(不但……而且)
not only … but also连接的句子成分一定要一致
The boy not only lost the money but also came close to losing his life.
He is like his mother not only in appearance but also in character.(not only+介词+名词,but also+介词+名词)
as well as(也怎么样)
We have read one of his novels as well as a few of his plays.
The kind man gave me some advice as well as some money.