| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [been] [v-ing] [prep] | 2255 |
|
| 2 | which [vb past] [been] [v-ing] | 162 |
|
| 3 | which [vb past] [been] [prep] | 113 |
|
| 4 | which [vb past] [v-ing] [prep] | 76 |
|
