it's hard to breathe是什么语法现象?是非谓语动词——不定式的什么用法?

Hurt so bad.sometimes it's hard to breathe. 求那位帮忙翻译一下,谢谢、 Hard to Breathe 歌词 英语翻译I find it hard to breathe It's driving me crazy trying to second guess you it's hard to breathe是什么语法现象?是非谓语动词——不定式的什么用法? 大家帮忙看看这句话有没有语法错误?it's so crowded that i feel hard to breathe. it's hard to it's hard to tell~ “It's hard to die. 英语翻译It's hard to breathe,it's hard not to see you.In a hard way of love,it's hard to reach you.You put me into my sadness,you left me no wish.I called your name everywhere but you didn't call mine.You burnt all the firewood for winter night.Y 英译汉：That makes it hard for them to move around,go upstairs and even breathe. Why should you sad about it hard to breathe?I will forget 英语翻译let the words Come easily to me You seem lost In your thoughts I find it hard to breathe Why won't you tell me what it is?It's driving me crazy trying to second guess you It's hard to comments to me. it's hard to make living It's hard to die怎么解释? It's hard to study English. 有没有It's hard to me it's very hard to p___everyone