| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have [vb pp] since | 48 |
|
| 2 | [Wh det] has [vb pp] since | 29 |
|
| 3 | [Wh det] had [vb pp] since | 18 |
|
| 4 | [Wh det] have happened since | 16 |
|
| 5 | what have [vb pp] since | 15 |
|
| 6 | [Wh det] have [vb pp] since | 14 |
|
| 7 | [Wh det] have existed since | 8 |
|
| 8 | [Wh det] have occurred since | 5 |
|
