| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there have [been] a long | 15 |
|
| 2 | there have [been] a long | 15 |
|
| 3 | there have been a long | 15 |
|
| 4 | there has [been] a long | 10 |
|
| 5 | there had [been] a long | 5 |
|
