| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] [to-vb] that [det] | 11 |
|
| 2 | must [be] [verb] [to-vb] that [det] | 11 |
|
| 3 | must [be] [vb pp] [to-vb] that [det] | 11 |
|
| 4 | must be [verb] [to-vb] that [det] | 11 |
|
| 5 | must [be] [verb] to ensure that [det] | 9 |
|
| 6 | must [be] taken [to-vb] that [det] | 7 |
|
| 7 | must [be] take [to-vb] that [det] | 7 |
|
