| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was an | 2114 |
|
| 2 | it is an | 1933 |
|
| 3 | it 's an | 1454 |
|
| 4 | it were an | 52 |
|
| 5 | it being an | 12 |
|
| 6 | it be an | 11 |
|
| 7 | it be an | 7 |
|
| 8 | it been an | 6 |
|
