“既~又~”的英语怎么说？

Not only... but also....

both...and 既...又...（平行关系）

not only...but also....不仅...而且....（递进关系）

not only,but also
比如：he is not only good at English but also at math.他不仅英语好数学也好。

both...and...
eg:He is both my best friend and my deskmate.

...not only...but also...

not only ^^^^^but also
注意就近原则