| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be a common [noun] | 80 |
|
| 2 | it [be] a common [noun sg] | 78 |
|
| 3 | it [is] a common [noun] | 57 |
|
| 4 | it is a common [noun] | 44 |
|
| 5 | it was a common [noun] | 23 |
|
| 6 | it [was/were] a common [noun] | 23 |
|
| 7 | it 's a common [noun] | 13 |
|
| 8 | it [be] a common experience | 6 |
|
| 9 | it [be] a common sight | 6 |
|
| 10 | it [be] a common experience | 6 |
|
| 11 | it [be] a common sight | 6 |
|
| 12 | it [be] a common practice | 5 |
|
| 13 | it [be] a common practice | 5 |
|
| 14 | it [be] a common mistake | 5 |
|
| 15 | it [be] a common mistake | 5 |
|
