it is of great help to me.

it is of great help to me. it is kind of you to help me It is very kind of you to help me. be of如何理解It is of great help to master a foreign language.可不 It is very kind of you to help me的help前为什么要加to It is kind of you ( ) help me . it is very kind of you to help me ,it是形式主语吗? It is very nice of you to help me 为什么要用of i think your advice is of great()to me and it's It is a great honor for me to make a speech on behalf of the I think your advice is of great to me and it's .A.value,well they all believe it is in great help to students