'As...as' expressions (BBC Learners' Questions)

source: BBC Learning English     2017年2月10日
Mohammad Tariq from Afghanistan wants to know what part of speech 'as...as' is.
Watch this video to find out the answer and test your understanding in our quiz here: http://www.bbc.co.uk/learningenglish/...

# click this line for more grammar videos on (not) as + adj./adv. + as