| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] be [v-ing] since | 54 |
|
| 2 | [vb past] [been] [v-ing] since | 54 |
|
| 3 | [vb past] been [v-ing] since | 54 |
|
| 4 | had [be] [v-ing] since | 49 |
|
| 5 | 'd [be] [v-ing] since | 5 |
|
| 6 | [vb past] [be] missing since | 5 |
|
