| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] be [v-ing] [prep] a | 226 |
|
| 2 | be [v-ing] [prep] a long | 58 |
|
| 3 | [vb past] be [prep] a long | 7 |
|
| 4 | [vb past] be [v-ing] a long | 6 |
|
