| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [adj] difficulty | 232 |
|
| 2 | [was/were] have [adj] | 103 |
|
| 3 | [was/were] have difficulty | 43 |
|
| 4 | [was/were] [adj] difficulty | 17 |
|
