| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] [prep] a | 6345 |
|
| 2 | been [v-ing] [prep] a | 582 |
|
| 3 | [be] trying [prep] a | 23 |
|
| 4 | be trying [prep] a | 23 |
|
| 5 | been trying [prep] [art] | 16 |
|
| 6 | been try [prep] a | 16 |
|
| 7 | been trying [prep] [art] | 16 |
|
| 8 | [been] trying [prep] a | 12 |
|
| 9 | been trying [prep] a | 12 |
|
| 10 | been trying [prep] a | 12 |
|
