| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] it must be [adj] | 14 |
|
| 2 | [vb past] it must be [adj] | 7 |
|
| 3 | know it must be [adj] | 7 |
|
| 4 | think it must be [adj] | 6 |
|
| 5 | [vb pp] it must be [adj] | 5 |
|
