5 лет назад
1. You must prepare all documents till Saturday.
2. You must have done everything in time. There is nothing to do about it now.
3. Who is responsible for the documents (who is to prepare the documents)? - It must be N.
4. I had to prepare all documents myself because my partner was ill.
5. I agree with you that everything must be done till Saturday.
6. The documents must. be prepared already. Unfortunately, no. One reference needed to be retyped.