| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be for [pron] [to-vb] | 5 |
|
| 2 | must be [prep] [pron] [to-vb] | 5 |
|
| 3 | must be [prep] [pers pn] [to-vb] | 5 |
|
| 4 | must be for [pron] [to-vb] | 5 |
|
| 5 | must be [prep] [pron] [to-vb] | 5 |
|
