| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] problems [modal v] occur | 7 |
|
| 2 | problems that [modal v] occur | 11 |
|
| 3 | problems that [modal v] occur | 11 |
|
| 4 | problems [conj] [modal v] occur | 11 |
|
| 5 | problems [that] [modal v] occur | 11 |
|
| 6 | problems which [modal v] occur | 5 |
|
| 7 | problems [pron] [modal v] occur | 5 |
|
| 8 | problems [Wh det] [modal v] occur | 5 |
|
| 9 | problems which [modal v] occur | 5 |
|
| 10 | problems [modal v] occur [prep] | 5 |
|
| 11 | problems [modal v] occur [prep] | 5 |
|
