now (need)
---
today (ride the bus)
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When I was (write my name)
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tomorrow (drink water)
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Next Tuesday (do homework)
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Yesterday (go)
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Tomorrow (study)
---
Now (eat)
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When I was (play)
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Now (read)
---
Last weekend (eat)
---
Today (buy)
---
Yesterday (drink)
---
When I was (visit)
---
Last year (make)
---
Today (ride)
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