Cho `2` câu sau:
`-` “You don’t like going by bus , do you? ” Actually I do like going by bus for short distances.
`-` The bus isn’t quicker than the train but is does stop right outside the factory.
Trợ động từ “do/does” ở trước động từ “like” và “stop” dùng để làm gì?
– The bus isn’t quicker than the train but it does stop right outside the factory.