| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has to be [verb] | 2886 |
|
| 2 | has to be [vb pp] | 2862 |
|
| 3 | [verb] to be used | 527 |
|
| 4 | have to be used | 121 |
|
| 5 | [vb -s] to be used | 93 |
|
| 6 | has to be used | 36 |
|
| 7 | has to be use | 36 |
|
| 8 | has to [be] used | 36 |
|
| 9 | has to be used | 36 |
|
| 10 | has to [be] used | 36 |
|
| 11 | has [prep] be used | 36 |
|
| 12 | has [prep] be used | 36 |
|
