| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] trying for [noun pl] [to-vb] | 10 |
|
| 2 | have been trying for [noun pl] [to-vb] | 10 |
|
| 3 | have [been] trying for years [to-vb] | 6 |
|
