| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [prep] a [noun] | 32437 |
|
| 2 | be [verb] [prep] a [noun sg] | 30518 |
|
| 3 | be [verb] [prep] [art] period | 308 |
|
| 4 | be [verb] [prep] [art] period | 308 |
|
| 5 | be [verb] [prep] a period | 196 |
|
| 6 | be [verb] [prep] a period | 196 |
|
| 7 | be [verb] [prep] a period | 196 |
|
| 8 | [be] [verb] [prep] a period | 196 |
|
