| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun sg] must be | 501 |
|
| 2 | [noun sg] must be in | 111 |
|
| 3 | [prep] [noun sg] be in | 9 |
|
| 4 | [prep] [noun sg] must in | 5 |
|
