综合辨析各时态的用法，重点掌握容易混淆的时态对。
要点讲解
- 一般现在时 vs 现在进行时：经常 vs 正在：He reads English every morning.（经常）/ He is reading English now.（正在）
- 一般过去时 vs 现在完成时：过去发生（有明确过去时间） vs 对现在有影响：I saw the film last night.（过去时）/ I have seen the film.（完成时，了解剧情）
- 一般过去时 vs 过去进行时：做了 vs 正在做（背景）：When I came in, he was cooking. 我进来时他在做饭。
- 现在完成时 vs 过去完成时：影响现在 vs 影响过去：I have finished my homework.（现在） / She said she had finished her homework.（她说的时候）
- 一般将来时 vs 过去将来时：从现在看将来 vs 从过去看将来：He will come tomorrow.（现在）/ He said he would come the next day.（过去）
- have gone to vs have been to：去了未回 vs 去过已回。
- since 与 for：since + 点，for + 段：since 2018, for five years。
经典例句
- I have lived here for six years. I moved here in 2020.
我在这里住了六年。我2020年搬来的。 - He said he would help us, and he will come soon.
他说他会帮我们，他很快就来。 - —Where have you been? —I have been to the library.
——你去哪里了？——我去图书馆了。
易错提醒
- 判断时态三看：看时间标志词、看上下文语境、看主从句关系（主将从现、过去的过去等）。