let is go为什么要加is这句话不是现在进行时啊、、、为什么要加IS呢?

let is go为什么要加is这句话不是现在进行时啊、、、为什么要加IS呢? let is go shoping.这句话错在哪里? Mike is go to school.这句话对吗?go后面要不要加ing? 请问这句话为什么要加thatHis dream is that he can go to a key school . let is go中文翻译 let is go let is go Oh let is go What is the meaning 为什么这句话要加the He is running这句话为什么run要加ning let is go to the children's center.(这句话哪个单词错了?) There is little time left.Let's go to the classroom.翻译这句话 I后面可不可以加is为什么 I is a miracle 这句话要在I后面加is let is go to the let is go and join The world is against me这句话中为什么要加IS呢 But he is very different after school is over.这句话为什么还加一个is over.不加它也不是说明白了吗? Hundreds of years ago,life was much harder than it is today.这句话为什么要加it is?直接写than today不行吗