| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be base [prep] [adj] [noun] | 618 |
|
| 2 | must be [prep] [adj] [noun] | 80 |
|
| 3 | must be base [prep] [noun] | 14 |
|
| 4 | must be base [prep] [adj] | 11 |
|
