| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [that] [modal v] occur | 88 |
|
| 2 | problems [that] [modal v] [verb] | 76 |
|
| 3 | problems [that] [modal v] [vb infin] | 75 |
|
| 4 | [noun pl] [that] [modal v] occur | 50 |
|
| 5 | problem [that] [modal v] occur | 12 |
|
| 6 | problems [that] [modal v] occur | 11 |
|
| 7 | problems [conj] [modal v] occur | 11 |
|
