| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have a hard time | 16 |
|
| 2 | [vb mod] [vb infin] a hard time | 16 |
|
| 3 | [vb mod] [verb] a hard time | 16 |
|
| 4 | [vb mod] have a hard time | 16 |
|
| 5 | [vb mod] [verb] a hard time | 16 |
|
