| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] [noun prp] | 39202 |
|
| 2 | [be] [vb pp] back [prep] | 1745 |
|
| 3 | [vb pp] back [prep] [noun prp] | 529 |
|
| 4 | [be] back [prep] [noun prp] | 349 |
|
