https://www.facebook.com/mslelinhtoeic mslelinhtoeic@gmail.com - 0936153906 https://www.facebook.com/hoctoeicvagiaotieptaithanhhoa When - Prep + time: câu tr l i ch a gi i t + danh t ch th i gian Time (th i m): at p.m Day (ngày): on Moday Date (tháng): on 15th of November Year (n m): in 2015 - Có hai b y hay g p lo i câu h i b t đ u v i When  B y v (Tense) When did you start studying English?  h i kh a years ago  câu tr l i b Next year  ch t ng lai  lo i  B y v lo i câu tr l i cho When ho c How long? How long have you been studying English? a years ago  sai b For years  When did you study English? a years ago  b For years  sai - Câu tr l i cho lo i câu h i When có th b t đ u b ng  when + clause Ex: When did you start studying English? - When I was years old  not until + clause / time Ex: When is the project expected to be finished? - Not until next year - Chúng ta c ng áp d ng lo i câu tr l i mang ý ngh a “I don’t know” cho lo i câu h i  I have no idea/ clue/ information I am not sure I haven’t decided yet It hasn’t been decided yet