the beginning of my preparation of GMAT foundations focusing on Reading Comp

baby070501

today i wanna share the "simple" word yet I read last night from the Economist.
the phrase:
Roughly two-and-a-half years after the revolutions in the Arab world,not a single country is yet plainly on course to become a stable,peaceful decocracy.

baby070501

I look up the word in  the Collins dictionary ,and here is the explanations.

                adv.        You use yet with a negative statement when you are talking about the past, to report something that was not the case then, although it became the case later.
                        eg.There was so much that Sam didn't know yet.
                adv.        If you say that something should not or cannot be done yet, you mean that it should not or cannot be done now, although it will have to be done at a later time.
                        eg.The hostages cannot go home just yet.
                adv.        You use yet after a superlative to indicate, for example, that something is the worst or the best of its kind up to the present time.
                        eg.Her latest novel is her best yet.
                adv.        You can use yet to say that there is still a possibility that something will happen.
                        eg.Like the best stories, this one may yet have a happy ending.
                adv.        You can use yet after expressions that refer to a period of time, when you want to say how much longer a situation will continue for.
                        eg.Unemployment will go on rising for some time yet.
                adv.        If you say that you have yet to do something, you mean that you have never done it, especially when this is surprising or bad.
                        eg.She has yet to spend a Christmas with her husband.
                conj.        You can use yet to introduce a fact that is rather surprising after the previous fact you have just mentioned.
                        eg.I don't eat much, yet I am a size 16.
                adv.        You can use yet to emphasize a word, especially when you are saying that something is surprising because it is more extreme than previous things of its kind, or a further case of them.
                        eg.They would criticize me, or worse yet, pay me no attention.