| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] may [verb] [prep] | 421 |
|
| 2 | problems [Wh det] [verb] [prep] | 50 |
|
| 3 | problems [Wh det] may [verb] | 21 |
|
| 4 | problems may [verb] [prep] | 15 |
|
