| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [verb] [prep] a | 6345 |
|
| 2 | [v-ing] [verb] [prep] a | 1000 |
|
| 3 | [v-ing] [been] [verb] [prep] | 870 |
|
| 4 | [v-ing] [been] [verb] a | 23 |
|
| 5 | [v-ing] [been] [prep] a | 15 |
|
