| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] be used [prep] [noun] | 272 |
|
| 2 | should [adv] be used [prep] | 69 |
|
| 3 | should be used [prep] [noun] | 50 |
|
| 4 | should [adv] be [prep] [noun] | 31 |
|
