| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [prep] a [adj] | 263 |
|
| 2 | be used [prep] a [adj] | 230 |
|
| 3 | to be used [prep] a | 163 |
|
| 4 | to be used [prep] [adj] | 110 |
|
