| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [verb] be [v-ing] [prep] | 10 |
|
| 2 | [prep] [v-ing] be [v-ing] [prep] | 7 |
|
| 3 | [prep] have be [v-ing] [prep] | 5 |
|
| 4 | [prep] [verb] been [v-ing] [prep] | 5 |
|
