
Originally Posted by
xversion1
"They won't arrive for two hours."
"They won't arrive for two hours yet."
In this case, "yet" doesn't mean clearly.
If 2 sentence are "They won't arrive." and "They won't arrive yet." I can show you function of yet:
"They won't arrive." means they absolutely won't arrive. (speaker sure)
"They won't arrive yet." means they could arrive or they couldn't arrive. (speaker doesn't sure)