| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [noun] [be] [to-vb] whether | 21 |
|
| 2 | [det] [noun sg] [be] [to-vb] whether | 19 |
|
| 3 | [det] study [be] [to-vb] whether | 11 |
|
| 4 | [det] study [be] [to-vb] whether | 11 |
|
