| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it had been a [noun sg] | 216 |
|
| 2 | it had [been] a [noun sg] | 187 |
|
| 3 | it had [been] an [noun sg] | 29 |
|
| 4 | it had [been] a mistake | 18 |
|
| 5 | it had [been] a shock | 6 |
|
| 6 | it had [been] a matter | 5 |
|
