| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be used [to-vb] | 1984 |
|
| 2 | [modal v] [not/n't] be used | 555 |
|
| 3 | [not/n't] be used [to-vb] | 97 |
|
| 4 | [modal v] [not/n't] be [to-vb] | 20 |
|
