What's the difference between till and until?I know both of them can be used as prep. and conj..

Question

Answer

Till is less formal then until. So, in writing, I'd use 'until'.

Looking at some of the other answers; there seems to be some confusion.
'Till' is not short for 'until'. It is a word in its own right, which means the same as 'until'. Till is perfectly correct.

Answer

proper and improper

Answer

‘til is short for "until".

so "until" is the correct word, 'til 是一個口語的縮約， 不正式的

Answer

http://learnwordlist.com/blog/difference-between-untiltill-and-up-to/2010/10/gre-word-list-test-blog-barrons-vocabulary

Non perdere l'opportunità di imparare una lingua comodamente da casa tua. Esplora la nostra selezione di insegnanti di lingue esperti e iscriviti subito alla tua prima lezione!