| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the problem [prep] the | 522 |
|
| 2 | the problem [be] the | 72 |
|
| 3 | the problem [be] [prep] | 69 |
|
| 4 | problem [be] [prep] the | 27 |
|
| 5 | the [be] [prep] the | 6 |
|
