| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] is usually a | 14 |
|
| 2 | which [is] usually a | 12 |
|
| 3 | [Wh det] [is] usually a | 8 |
|
| 4 | [Wh det] [is] usually an | 6 |
|
