all i have to do is learn english分析一下这个句子结构,是名词性从句嘛?

all i have to do is learn english分析一下这个句子结构,是名词性从句嘛? 请问这个句子中all I have to do is learn english.is跟learn不是都是动词吗?为什么 All I have to do is learn English.这句里learn是动词,前面干吗用is All I have to do is learn English. 中的learn是不定式吗? All I have to do is learn English 是对的吗 all i have to do is learn english.为什么不是all i have to do is l All I have to do is learn English.中的learn用法对吗 All I have to do is learn English,看了有些答案说是All I have to do i All I have to do is learn English.这句话语法对吗? all i have to do is learn english是否错了? It is important to learn English.的句子结构分析 I find it hard to learn English well.请讲解分析一下这个句子.