| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [pron] [prep] a | 427 |
|
| 2 | [be] [v-ing] [prep] a long | 55 |
|
| 3 | [v-ing] [pron] [prep] a long | 17 |
|
| 4 | [be] [pron] [prep] a long | 6 |
|
