| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] which [noun] be [v-ing] | 154 |
|
| 2 | [prep] which [noun] had be | 93 |
|
| 3 | [prep] [noun] had be [v-ing] | 60 |
|
| 4 | which [noun] had be [v-ing] | 21 |
|
