Some of my students asked about the various uses of this word. So here we go then ladies and gentlemen
YET - Non-affirmative word
a) Negative sentences - Looking to the future: to say that something which is expected has not happened but we hope it will.
- Has the hamster died? ~ Not yet! (but we hope it will)
- The hamster hasn't died yet! (but we still hope it might)
b) Question sentences - to ask whether something expected has happened.
- Is the hamster dead yet?
- Have you won the lottery yet? If not, keep trying damn you!
b) YET - (in the above) is often used with present perfect in British English but with Past Simple in the slightly more backwards primitive American English (no offence to my dear American friends)
- Have you washed your armpits yet? (Normal British English)
- Did you wash your armpits yet? (....... American English)
c) YET - meaning "Still." Yet can be used in affirmative sentences to mean still. This is quite formal and is gay in casual spoken English. The most common structure is: HAVE + YET + INFINITIVE
- You have yet to pass your driving test!
- (normal): You still need to pass your driving test!
d) YET - after superlatives. Meaning: ever so far! Quite informal and sweet!
- This is the tastiest Domestos yet! (tastiest ever so far!)
- This holiday in Afghanistan is the best yet! (best ever so far!)
e) YET - Discourse marker. Suggests that something is surprising in view of what was said before.
- Mrs Wurst, your application says you're a woman and yet you have a massive beard!
- John claims to be a man of honour. Yet, he has about 20 wives all living in different countries! Lucky bastard!