| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can [vb infin] [pron] [modal v] [verb] | 92 |
|
| 2 | [modal v] [vb infin] [pron] [modal v] happen | 14 |
|
| 3 | can [verb] [pron] [modal v] happen | 9 |
|
