もう ありません means that what one had some time ago is no longer there. まだ あります means that one still has something s/he had some time ago. The verb います is used in the same way.
コーヒーを のみました。コーヒーは なくなりました。
I drank coffee. The coffee is gone.
→コーヒーは もう ありません。
There's no more coffee.
まだ パンを 食べて いません。
I haven't eaten bread yet.
→パンは まだ あります。
There's still some bread.
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【もう and まだ】
もう indicates that there has been a change in the state in which
somebody/something was some time ago.まだ indicates the continuation of the state. もう and まだ can be used with both affirmative and negative predicates, indicating different meanings. |
Lesson 7-1「もう うちへ かえりました。」
S/he has already gone home.
Lesson 7-1「まだ 返事が 来ません。」
I haven't gotten a reply yet.