In this video, Jay teaches you about Comparative Adverbs. ... the same time it will prepare you for the Cambridge Preliminary test (PET B1). ... <看更多>

250 views, 21 likes, 5 loves, 0 comments, 1 shares, Facebook Watch Videos from BCS Helpline: BCS Preliminary Basic English Grammar Class on Adjective &... ... <看更多>

Too many commas — old-fashioned. Try: We prove first two preliminary properties and then the whole theorem. ... <看更多>