Don't ____(be) late tomorrow

Don't ____(be) late tomorrow Don't be late ____ next time Don't ____ (be)late again Don't ____(be)late for school I ____(be) late. Don’t ________ (late ) again 连词成句:late school be don`t for tomorrow Don't be late. Don't be late don’t be late don't be late tomorrow是个什么句式,don't是助动词吗? Don't be late for school,____?Sorry,I____ I don't know if he ____(be) free tomorrow.