| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [modal v] have [noun] | 1076 |
|
| 2 | [noun] [modal v] [vb infin] difficulty | 107 |
|
| 3 | [noun] [modal v] [verb] difficulty | 107 |
|
| 4 | [noun] [modal v] have difficulty | 59 |
|
