| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [adj] [noun] | 3658 |
|
| 2 | [verb] [adj] difficulty | 540 |
|
| 3 | have [adj] difficulty | 232 |
|
| 4 | [vb -s] [adj] difficulty | 50 |
|
| 5 | has [adj] difficulty | 24 |
|
