| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [v-ing] for a | 184 |
|
| 2 | [vb infin] [been] [v-ing] [prep] a | 30 |
|
| 3 | [vb infin] [been] [verb] for a | 29 |
|
| 4 | [vb infin] [been] [v-ing] for [art] | 12 |
|
| 5 | [vb infin] [been] [v-ing] for [art] | 12 |
|
| 6 | [vb infin] [been] [v-ing] for a | 6 |
|
| 7 | [vb infin] [be] [v-ing] for a | 5 |
|
