| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this [was/were] a [noun] | 915 |
|
| 2 | this [was/were] a [noun sg] | 889 |
|
| 3 | this [be] a system | 14 |
|
| 4 | this [was/were] [art] system | 8 |
|
| 5 | this [was/were] [art] system | 8 |
|
| 6 | [adj] [was/were] a system | 7 |
|
| 7 | [det] [was/were] a system | 7 |
|
| 8 | this [was/were] a system | 6 |
|
| 9 | this [was/were] a system | 6 |
|
| 10 | this [was/were] a system | 6 |
|
