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Example
Perfect needs more natural time markers: already, yet, before..., by...
| Scheme | Example |
|---|---|
| S + V | I have finished. |
| S + V + O | I have finished the report. |
| S + V + P | I have worked at the office. |
| S + V + T | I have already finished. |
| S + V + O + T | I have finished the report today. |
| S + V + P + T | I had worked at the office before the meeting. |
| S + V + O + P | I have taken photos in the park. |
| S + V + O + P + T | I will have taken photos in the park by Sunday. |