| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [be] at [noun] | 1935 |
|
| 2 | [pron] [be] happen at | 83 |
|
| 3 | [pron] happen at [noun] | 65 |
|
| 4 | [be] happen at [noun] | 27 |
|
