否定句
表示不、无、未等意义的句子皆称为否定句。否定句包括全部否定句、部分否定句、否定疑问句和特殊否定句。
肯定句中的some在否定句中一般要改用any。
There aren't any left.
没存货了。
There are some left
肯定句中有already, 改为否定句要改用为yet。
I haven＇t finished reading the newspaper yet.
我还没看完报纸。
回答一般疑问句时,如果是肯定的回答要用yes,加肯定句;否定的回答要用no,加否定句。 You don＇t want to go with me, do you? No, I don＇t. 你不想和我去，是吗? 是的，我不想去。
全部否定句中通常带有no, not...any, none, nobody, nothing, never等表示全部否定意义的字。
No road is long with your wife.
与贤妻为伴路遥不觉远。
部分否定句中通常带有和not连用的all, both, every等不定代名词或表示"完全、必然、总是"等意思的副词。
Not everyone likes shopping.
并非每人都喜欢购物。
间接引句：时态
1. 主要子句述语动词为简单过去式时,间接引句的时态变化为:
简单现在式→简单过去式;简单过去式→过去完成式;现在完成式→过去完成式; 现在进行式→过去进行式。
I want to buy something to eat.
我想买点吃的。
He said he wanted to buy something to eat.
他说他想买点吃的。
I didn't do anything wrong.
我没做什么错事。
He said he hadn't done anything wrong.
他说他没做什么错事。
I haven't eaten anything for a day.
我一天都没吃东西了。
He told me he hadn't eaten anything for a day.
他告诉我他一天没吃东西了。
My stomach is making noise.
我的肚子饿得咕噜叫。
He said his stomach was making noise.
他说他的肚子饿得咕噜叫。
2. 如果直接引句中有表示绝对过去的时间的副词,简单过去式通常不必变成过去完成式。
I was arrested in March.
我是三月份被捕的。
He said he was arrested in March.
他说他是三月份被捕的。
3. 转述假设语气的直接引句变间接引句时或表示永恒真理时不改变时态。
If I were you, I would wait outside.
如果我是你，我就在外面等。
He said that if he were me, he would wait outside.
他说如果他是我，他就会在外面等着。
Father said, "Light travels much faster than sound."
父亲说,"光比声音传播快得多。"
Father said that light travels much faster than sound.
父亲说光比声音传播快得多。