| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [prep] be [verb] | 4677 |
|
| 2 | which is [prep] be | 198 |
|
| 3 | which is [prep] [verb] | 23 |
|
| 4 | which [prep] be [verb] | 13 |
|
