| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which had been [verb] | 2021 |
|
| 2 | which had been [vb pp] | 1857 |
|
| 3 | which had been [adv] | 242 |
|
| 4 | which had been [adv] | 235 |
|
| 5 | which had been [adj] | 172 |
|
| 6 | which had been [v-ing] | 162 |
|
| 7 | which had been [adj] | 149 |
|
| 8 | which had been [art] | 124 |
|
| 9 | which had been [art] | 124 |
|
| 10 | which had been [prep] | 113 |
|
| 11 | which had been [prep] | 113 |
|
| 12 | which had been the | 74 |
|
| 13 | which had been the | 74 |
|
| 14 | which had been in | 60 |
|
| 15 | which had been in | 60 |
|
| 16 | which had been make | 51 |
|
| 17 | which had been a | 50 |
|
| 18 | which had been made | 49 |
|
| 19 | which had been set | 48 |
|
| 20 | which had been set | 48 |
|
| 21 | which had been a | 42 |
|
| 22 | which had been build | 41 |
|
| 23 | which had been built | 35 |
|
| 24 | which had been so | 34 |
|
| 25 | which had been so | 34 |
|
| 26 | which had been establish | 33 |
|
| 27 | which had been take | 33 |
|
| 28 | which had been established | 32 |
|
| 29 | which had been left | 31 |
|
| 30 | which had been used | 31 |
|
