I have a question about where to use is and has. Examples:
- Tea is come or Tea has come
- Lunch is ready or Lunch has ready
- He is come back or He has come back
- She is assigned for work or She has assigned for work
Actually these were the sentences that I came across in the last few days, and everybody uses 'is' but I think 'has' is correct, so I'm just confused about how to differentiate 'is' and 'has'. Can you please help clear my confusion?