| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] must [vb infin] be in | 16 |
|
| 2 | [noun sg] must [verb] be in | 16 |
|
| 3 | [noun sg] must [verb] been in | 15 |
|
| 4 | [noun sg] must have be in | 15 |
|
| 5 | [noun sg] must have be in | 15 |
|
