| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] [prep] a | 665 |
|
| 2 | [v-ing] [prep] a long | 141 |
|
| 3 | [been] [prep] a long | 31 |
|
| 4 | [been] [v-ing] a long | 16 |
|
