| 形式 | 用在什么时候 | 例句 |
|---|---|---|
| do | 现在时 · 非第三人称单数 | I do like it. (我确实喜欢) |
| does | 现在时 · 第三人称单数 | He does look tired. (他看上去确实累) |
| did | 过去时(不分人称) | He did come. (他确实来了) |
| 强调谁 | 例句 |
|---|---|
| 主语 | It was Tom that helped us. |
| 宾语 | It is Tom that she likes. |
| 表语 | It is engineer that Tom's dream job is. |
| 状语 | It was in Paris that they got married. |
| 口诀 | 适用范围 |
|---|---|
| "do 一出现,动词回原形。" | 第一套 · do/does/did + 原形,只强调谓语 |
| "谓语走 do,其余走 It is that。" | 强调谓语用第一套;强调主/宾/表/状用第二套 |
| "去掉 It is 与 that,还成句就是强调句。" | 分清真强调句 与 主语从句后移 |