| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [verb] [prep] a | 2772 |
|
| 2 | had [vb pp] [prep] a | 2473 |
|
| 3 | had worked [prep] [art] | 207 |
|
| 4 | had worked [prep] [art] | 207 |
|
| 5 | [verb] worked [prep] a | 142 |
|
| 6 | have worked [prep] a | 141 |
|
| 7 | had work [prep] a | 72 |
|
| 8 | had worked [prep] a | 71 |
|
| 9 | [vb past] worked [prep] a | 66 |
|
| 10 | had worked [prep] a | 62 |
|
