| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] since 1988 | 8 |
|
| 2 | have [vb pp] since 1988 | 8 |
|
| 3 | [noun] [vb pp] since 1988 | 5 |
|
| 4 | been [vb pp] since 1988 | 5 |
|
| 5 | [be] [vb pp] since 1988 | 5 |
|
| 6 | [been] [vb pp] since 1988 | 5 |
|
| 7 | be [vb pp] since 1988 | 5 |
|
| 8 | [vb pp] [adv] since 1988 | 5 |
|
| 9 | [vb pp] since [noun] 1988 | 8 |
|
| 10 | [vb pp] since [noun prp] 1988 | 8 |
|
