有语法错误.
你可以改成这样：
Enjoying the music,I also learned a lot of things.
从句是：Enjoying the music,
主句是：I also learned a lot of things.

1. At this time,let me tell you about my hobbies.

2. In my eyes,all things in the world are both beautiful.So,I have a lot of favorite things   

3.  Mountaineering has become the best choice

4.  On sunny mornings, I often with friends to climbing mountain is a very happy thing.

   这几句话有没有语法错误，应该怎么改

    

1.无2.so （前面用逗号，后面不用逗号）In my eyes,all things in the world are both beautiful,SoI have a lot of favorite things.3.无4.非常严重的语法错。改为： I often climb mountain with friends,because it isa very happy thing.。(it代指climb mountain ）分析：原句： I often with friends to climbing mountain is a very happy thing.①to后面+动词原形；②这里感觉有两个句子夹在一起，既然这样就分开来写，就像上面的正确答案那样。最后建议你去看看语法书上的从句和主句之间的用法。还有个主谓宾的语法。有其它