定义 / 说明
英语有多种“语法层面”的强调方式，不只是提高音量。两种核心手段是 cleft sentences 和“强调助动词”。Cleft 可聚焦某个信息点：It was John who called / What I need is time。强调 do/does/did 可强化肯定句，常用于纠正、坚持或情绪加强。它们在论证、澄清、说服中很有用。
关键规则
- 用 It is/was ... that/who ... 聚焦某成分。
- 用 What-clause + be 聚焦核心信息/需求。
- 在肯定句里用 do/does/did + base verb 表强调：I do agree.
- 它们改变的是“强调”，不是事实内容。
- 不宜过度使用，否则显得戏剧化或防御性强。
例句
- What I do need is time. - 我真正需要的是时间。
- I do agree with you. - 我确实同意你。
- It was Anna who solved the problem. - 解决问题的是 Anna。
- What we need is a better plan. - 我们需要的是更好的计划。
- He did call me, but I missed it. - 他确实给我打了电话，但我错过了。
常见错误
- ❌ What I need it is time. -> ✅ What I need is time.
- ❌ I do agrees with you. -> ✅ I do agree with you.
- ❌ It was John which called. -> ✅ It was John who called.