Still, yet, and already usage
1. Still still emphasizes that past events and existing conditions are still continuing. In the negative sentence at the time of completion, still indicates a surprised or impatient tone. However, in the current progress, still only indicates that the action is sustained, not emotional. For example, my neighbor hit my car last week and he still hasn' t apologised. My neighbor hit my car last week, but he hasn't apologized yet. He's still living with his mother. He still lives with his mother. 2. Yet yet is often used in the question and negative sentence. In the question, it is used to ask whether the things that the speaker expects have occurred. In a negative sentence, it indicates that what the speaker expects has not yet occurred. Example: John, have you finished that report yet? John, have you written the report? John hasn't finished that report yet and I asked him for it three days ago. John hasn't finished writing the report yet, but I have to hand it over three days ago. 3. Already already indicates "already", which is often used in a definite sentence. For example, it's only 11 o'clock and they have already had lunch. It's only 11 o'clock and they have lunch. Are they building a new hotel here? There are too hotels already. Do they want to build a new hotel here? There are already enough restaurants here. [Note] already can also be used occasionally in question, which means "surprise. Example: Have you finished the work already? You are very speedy. Have you finished your work? Your speed is really fast. [Example] The Moon, everybody. [Answer] B. Already is changed to yet. ※Differences between so and too and their usage