| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [been] [v-ing] [prep] a | 148 |
|
| 2 | [been] [v-ing] [prep] a long | 30 |
|
| 3 | [vb base] [been] [prep] a long | 10 |
|
| 4 | [vb base] [been] [v-ing] a long | 7 |
|
