| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] since [adj] | 54 |
|
| 2 | [been] [v-ing] since [num] | 47 |
|
| 3 | [been] running since [adj] | 8 |
|
| 4 | [been] [v-ing] since nineteen | 5 |
|
| 5 | [been] [v-ing] since 1987 | 5 |
|
| 6 | [been] operating since [adj] | 5 |
|
| 7 | [been] [v-ing] since nineteen | 5 |
|
| 8 | [been] [v-ing] since 1987 | 5 |
|
