| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [not/n't] be used [prep] | 84 |
|
| 2 | should be used [prep] [det] | 29 |
|
| 3 | [not/n't] be used [prep] [det] | 29 |
|
| 4 | should [not/n't] be [prep] [det] | 17 |
|
