The last lesson taught you to report what other people often say or just said:
- Joanne said today, "I am going to China tomorrow."
- → Joanne said today that she is going to China tomorrow.
In this example, the verb remained in the same tense. However, when we report something that has already happened, we need to shift the verb tense backward. For example, if today is Wednesday:
- Joanne said on Monday that she was going to China on Tuesday.
Since Joanne has already gone to China, the verb tense changed from present to past: 'is going' became 'was going'.
To report things that have already happened, we shift the present tense to the past, the past tense to the past perfect, and the future tense to the conditional mood: