| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [be] [prep] [noun] since | 89 |
|
| 2 | [vb past] [be] [prep] [noun sg] since | 79 |
|
| 3 | [vb past] [be] [prep] operation [prep] | 12 |
|
| 4 | [verb] [be] [prep] operation since | 10 |
|
| 5 | [vb past] [be] [prep] operation since | 5 |
|
| 6 | [vb past] [be] [prep] operation since | 5 |
|
