| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [pron] to | 2461 |
|
| 2 | [vb infin] [pron] happened to | 64 |
|
| 3 | [modal v] [vb infin] [pron] happened | 33 |
|
