I find it difficult to learn English 和 I find it isdifficult to learn English 有什麽不同

1.I find it difficult to learn English.主语：I；谓语：find；形式宾语：it；宾语补足语：difficult；真正的宾语：不定式to learn English2.I find it is difficult to learn English.1）主句为：I find...主语：I...