尚未用英语

I haven't received his single word.

我还没有确定I'm not sure yet.

I have got no reflection from him,even a word! 用肯定句式表达否定，感觉这样说贴切一点！

“还没有”的意思

尚未...。还没有。

与情态动词can/could连用 这时候从句虽为肯定形式，根据汉语表达习惯译成“还没来得及就”，如： Before I could get in a word，he had measured me. 我还没来得及插话他就为我量好了尺寸。 Before she could move，she heard a loud noise，which grew to a terribl eroar. 她还没来得及迈步，就听见一声巨响，接着就是可怕的隆隆轰鸣。

not yet yet用在否定句里

I haven't received his a word or twohttp://fanyi.baidu.com/translate?