| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] happen a [adj] time ago | 5 |
|
| 2 | have happen a [adj] time ago | 5 |
|
| 3 | [verb] happened a [adj] time ago | 5 |
|
| 4 | [verb] happen a long time ago | 5 |
|
| 5 | [verb] happen a [adj] time ago | 5 |
|
