網頁

Using 'must' & 'have to' in English


source: JamesESL English Lessons (engVid)    2008年11月14日
http://www.engVid.com/ What's the difference between 'must' and 'have to'? In this short English lesson, I explain.

# click for grammars on modals: expressing obligation and necessity
click this line for more grammar videos on modals