| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [modal v] [be] [verb] | 41322 |
|
| 2 | problem [modal v] [be] [verb] | 428 |
|
| 3 | problem [pron] [modal v] [verb] | 190 |
|
| 4 | problem [pron] [be] [verb] | 120 |
|
| 5 | problem [pron] [modal v] [be] | 73 |
|
