I to bear this is some burden 这里为什么要加TO,不加的话有什么不同吗

I to bear this is some burden 这里为什么要加TO,不加的话有什么不同吗 英语翻译This is a heavy burden for films to bear.Without denying I think it difficult to answer this question 为什么可以it 不加is? it is just too must burden to bear i like music that i can dance to,为什么要加to,不加可以吗? I think this talk is worth listening to.句中为什么要加to? I like to paint 为什么要加to,不加可以吗 I like to paint 为什么要加to,不加可以吗? I find it is easy to do sth ,这里的IS可加可不加吗 I promise you 为什么不加to I'm go to the house这里的GO为什么不加动词也可以,不是已经有谓语了吗 want到底什么时候后面要加to,什么时候不加?比如：I want to buy some ciothes,还有：I w