| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | thing that [vb mod] happen | 40 |
|
| 2 | thing that [modal v] happen | 40 |
|
| 3 | thing that [modal v] happen | 38 |
|
| 4 | thing that could happen | 20 |
|
| 5 | thing that could happen | 20 |
|
| 6 | thing that can happen | 15 |
|
| 7 | thing that can happen | 15 |
|
