never词性

never词性 never是什么词性的 never nothing anything是什么词性 i have never been abroad before 这个before是什么词性 词性! we never know the worth of till...we never know the worth of till the well is dry.还有,till 是什么词性,well是什么词性, she smile often and never says a bad word about anyone分析句子成分,标词性 词性转换：I don't think Jack is______.He never tells lies.(honesty) I will never find my way back to camp.这里 back 是什么词性 什么用法? A friend is never known till a man has need.每个单词所对应的词性 Never never never Never never NEVER never. NEVER