| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be use [to-vb] [adj] | 26 |
|
| 2 | should be used [to-vb] [adj] | 26 |
|
| 3 | should be use [to-vb] [adj] | 17 |
|
| 4 | should be use [to-vb] [det] | 9 |
|
