| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [adv] be used [prep] | 153 |
|
| 2 | [adv] be used [prep] [det] | 69 |
|
| 3 | should be used [prep] [det] | 29 |
|
| 4 | should [adv] be [prep] [det] | 22 |
|
