| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] be | 3545 |
|
| 2 | must [vb infin] been | 3430 |
|
| 3 | must have be | 3376 |
|
| 4 | must [vb infin] is | 90 |
|
| 5 | must 've be | 58 |
|
| 6 | must do be | 33 |
|
| 7 | must [vb infin] being | 8 |
|
| 8 | must [vb infin] was | 7 |
|
| 9 | must [vb infin] are | 7 |
|
| 10 | must know be | 5 |
|
| 11 | must ask be | 5 |
|
| 12 | must decide be | 5 |
|
