| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [not/n't] [prep] [det] | 1590 |
|
| 2 | be used [prep] [det] | 878 |
|
| 3 | be [not/n't] used [prep] | 176 |
|
| 4 | [not/n't] used [prep] [det] | 61 |
|
