| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] it [adj] | 71 |
|
| 2 | [Wh det] made it [adj] | 65 |
|
| 3 | [Wh det] [vb past] it possible | 16 |
|
| 4 | [Wh det] [vb past] it difficult | 11 |
|
| 5 | [Wh det] [vb past] it impossible | 9 |
|
| 6 | [Wh det] [vb past] it clear | 7 |
|
| 7 | what [vb past] it [adj] | 7 |
|
