| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be made subject | 11 |
|
| 2 | may be [vb pp] subject | 10 |
|
| 3 | should be [vb pp] subject | 5 |
|
| 4 | must be [vb pp] subject | 5 |
|
