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Free English Grammar E-Book Level 2 doc
... E -Book Level 2 ~ 27 ~ www.espressoenglish.net Present Perfect + For / Since The present perfect is also used with for and since to talk about actions that began in the past and ... verbs “work” and “live”: “I’ve worked here since 19 92. ” = “I’ve been working here since 19 92. ” However, we often use the present perfect continuous to emphasize the action, and the present ... difference? Must and required are more formal than have to and need to. Don’t use “to” after “must.” For the past and future of “can,” you can use could / was allowed to (in the past) and will be...
Ngày tải lên: 15/03/2014, 03:20