| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | attention must be [vb pp] to | 28 |
|
| 2 | attention must [be] [vb pp] to | 28 |
|
| 3 | attention must [be] paid to | 14 |
|
| 4 | attention must [be] given to | 10 |
|
