| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [v-ing] [prep] a | 521 |
|
| 2 | [verb] [been] [v-ing] [prep] a | 521 |
|
| 3 | have [been] [verb] [prep] a | 446 |
|
| 4 | have [been] [v-ing] [prep] [art] | 120 |
|
| 5 | have [been] [v-ing] [prep] [art] | 120 |
|
| 6 | have [been] [v-ing] [prep] a | 33 |
|
| 7 | have [be] [v-ing] [prep] a | 30 |
|
| 8 | [vb infin] [been] [v-ing] [prep] a | 30 |
|
