判断句子语法对错并改正,说明为什么1.You can visit museums as well as enjoy tasty food in different places.2.I can play table tennis and communicate with foreigns.3.I can play tennis and ride a bike.

第二个foreigns改为foreigners，这个到不属于语法，可能是你打错了。
三句话的语法都没有问题。
我想你的困惑是在于连词as well as 和 and后面到底该用哪种动词形式，and属于并列连词，因此它后面用的动词形式应于前面保持一致，而as well as此处义同and，用法也一样。三句都保持了前后动词的一致，因此三句都没有错。

1.You can visit museums “as well as” enjoy tasty food in different places.
正确：You can visit museums “and” enjoy tasty food in different places.本意说 美食和美景可以同时满足你，但是AS WELL 是不合用

2.I can play table tennis and communicate with foreigns.
正 I can play table tennis and communicating with foreigns too。
3.I can play tennis and ride a bike.
正I can playing tennis and riding a bike.

1.in 改为 from
2.foreigns 改为 foreigners
3.a 改为 the