| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] that these [noun pl] | 15 |
|
| 2 | must be [verb] that these [noun pl] | 15 |
|
| 3 | must be [verb] that these [noun pl] | 15 |
|
| 4 | must be remembered that these [noun pl] | 6 |
|
| 5 | must be remember that these [noun pl] | 6 |
|
