| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been trying for | 40 |
|
| 2 | [vb past] been trying for | 14 |
|
| 3 | [vb -s] been trying for | 13 |
|
| 4 | [vb base] been trying for | 12 |
|
| 5 | has been trying for | 12 |
|
| 6 | had been trying for | 11 |
|
| 7 | 've been trying for | 7 |
|
| 8 | have been trying for | 5 |
|
