| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [vb pp] at [v-ing] [art] | 54 |
|
| 2 | which [is] [vb pp] at [art] | 52 |
|
| 3 | which [is] [vb pp] at [v-ing] | 15 |
|
