| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [det] [noun] | 1557 |
|
| 2 | been [det] [noun sg] | 1122 |
|
| 3 | be [det] improvement | 32 |
|
| 4 | [be] [det] improvement | 32 |
|
| 5 | been [det] improvement | 19 |
|
| 6 | been [adj] improvement | 16 |
|
| 7 | [been] [det] improvement | 13 |
|
