I also can play basketball.

I can also play basketball

若改为I also play basketball.I play also basketball.两句哪个对？
I also play basketball.这句对

后面对 also 置于系动词,能愿动词之后,实意动词之前

说出来都是对的,但是根据说的语气不同句子可能会有不同的意思.

若改为I also play basketball.I play also basketball.两句哪个对？

前一句对.
我也打篮球.

The second

其实两个都有用，但语法上讲应是第二句，ALSO用于be动词和情态动词后

I can also play basketball