| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [vb pp] [prep] [noun] | 3612 |
|
| 2 | [adv] [vb pp] back [prep] [noun] | 131 |
|
| 3 | is [adv] [vb pp] back [prep] | 37 |
|
| 4 | is [vb pp] back [prep] [noun] | 29 |
|
| 5 | is [adv] back [prep] [noun] | 21 |
|
