| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [to-vb] [prep] these problems | 7 |
|
| 2 | [noun sg] [to-vb] [prep] these problems | 5 |
|
| 3 | [to-vb] [det] [prep] these problems | 9 |
|
| 4 | [to-vb] [adj] [prep] these problems | 9 |
|
