| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [adv prt] since [num] | 13 |
|
| 2 | have been [vb pp] [adv prt] since [num] | 9 |
|
| 3 | has been [verb] [adv prt] since [num] | 7 |
|
