| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [been] [vb pp] for [det] year | 20 |
|
| 2 | [vb base] be [vb pp] for [det] year | 20 |
|
| 3 | [vb base] been [vb pp] for [det] year | 20 |
|
| 4 | [vb base] [be] [vb pp] for [det] years | 19 |
|
| 5 | have [be] [vb pp] for [det] year | 17 |
|
| 6 | [vb base] [be] [vb pp] for many year | 15 |
|
| 7 | [vb base] [be] known for [det] year | 7 |
|
