Question

You are red all over. How long you (to lie) in the sun today?

Answer 1

Ты весь красный. Как долго ты лежал на солнце сегодня?
You are red all over. How long do you lay in the sun today?

Answer 2

how long have you been lying in the sun today?
present perfect continuous нужен!!!!!!
к тому же ---lie. изменяется на lying