time의미를 표현하는 expression들은 아래와 같다.
1. Pluperfect
- had + past-participial
2. Past
- preterite
- auxiliary verb + have + past-participial
Examples.
- It must have been in the spring of 1920.
3. Present
- plain present
4. Future
- will $\mathrm{V}$
- be going to $\mathrm{V}$
- be to $\mathrm{V}$