Used to for past habits or statesDòng thời gianIntroduction - Used to for past habits or states00:10Presentation - "USED TO"01:20Formula and usage of "USED TO"03:10Affirmative form03:13Negative form03:22Question form04:45Rewrite the sentences using USED TO04:57Conclusion06:10Tiếp theoBài tập Grammar 2