| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] a long [noun] [prep] | 429 |
|
| 2 | [be] a long [noun sg] [prep] | 425 |
|
| 3 | [be] a [adj] period [prep] | 75 |
|
| 4 | [be] [art] long period [prep] | 8 |
|
| 5 | [be] a long period [prep] | 7 |
|
