| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] must be seen [prep] be | 15 |
|
| 2 | [noun sg] must be seen [prep] be | 15 |
|
| 3 | [noun sg] must [be] seen [prep] be | 15 |
|
| 4 | [noun sg] must [be] seen to be | 15 |
|
