What is the proper placement of the adverbs of frequency in the sentences?

Here are the sentences with the adverbs of frequency placed correctly: 1. He often helps his mum with the shopping. 2. Do you often watch TV? 3. We are sometimes late for school. 4. Is he always so nervous? 5. I never have classes in the evening. 6. I never read in bed. 7. They are always busy.