Here are two grammar points to note from the mistakes in Friday's lesson:
1. Commas don't connect sentences
You can't write "They asked me to do an interview, I felt so shy" with a comma connecting the two ideas. You would need a full stop or a linking word like "and" or "but" (e.g. They asked me to do an interview, but I felt so shy).
2. Don't put "which" and "it" together
You can't write "a conversation which I found it interesting". Delete the "it".
Click here to see all of the answers to Friday's exercise.