| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be a s | 36 |
|
| 2 | [is] a s | 21 |
|
| 3 | 's a s | 18 |
|
| 4 | [was/were] a s | 12 |
|
| 5 | was a s | 12 |
|
