| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [verb] [is] [adj] | 192 |
|
| 2 | [vb mod] [vb infin] [is] [adj] | 191 |
|
| 3 | [vb mod] happen [be] [adj] | 7 |
|
| 4 | [vb mod] happen [is] [adj] | 7 |
|
| 5 | [modal v] happen [is] [adj] | 7 |
|
