| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been trying [prep] a | 12 |
|
| 2 | [verb] been trying [prep] a | 12 |
|
| 3 | [vb past] been trying [prep] a | 7 |
|
| 4 | been trying [prep] a [noun] | 8 |
|
| 5 | been trying [prep] a [noun sg] | 8 |
|
