| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] had [been] [verb] [prep] | 1405 |
|
| 2 | [Wh det] had [been] [vb pp] [prep] | 1330 |
|
| 3 | [pron] had [been] built [prep] | 43 |
|
| 4 | [Wh det] [verb] [been] built [prep] | 31 |
|
| 5 | [Wh det] have [been] built [prep] | 31 |
|
| 6 | [Wh det] [vb past] [been] built [prep] | 23 |
|
| 7 | [Wh det] had [be] built [prep] | 23 |
|
| 8 | [Wh det] had [been] build [prep] | 23 |
|
