| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [verb] [prep] a | 1700 |
|
| 2 | had [been] [vb pp] [prep] a | 1513 |
|
| 3 | have [been] developed [prep] a | 44 |
|
| 4 | [verb] [been] developed [prep] a | 44 |
|
| 5 | had [been] developed [prep] [art] | 26 |
|
| 6 | had [been] developed [prep] [art] | 26 |
|
| 7 | had [been] developed [prep] a | 8 |
|
| 8 | had [been] develop [prep] a | 8 |
|
| 9 | had [been] developed [prep] a | 8 |
|
| 10 | [vb past] [been] developed [prep] a | 8 |
|
| 11 | had [be] developed [prep] a | 8 |
|
