| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [subord] it [is] [verb] | 16 |
|
| 2 | is [subord] it [is] [vb pp] | 15 |
|
| 3 | is [subord] it is [verb] | 11 |
|
| 4 | is because it [is] [verb] | 8 |
|
| 5 | is [subord] it 's [verb] | 5 |
|
