| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] be up to | 42 |
|
| 2 | [vb base] been up to | 31 |
|
| 3 | 've be up to | 19 |
|
| 4 | have be up to | 12 |
|
| 5 | [vb base] is up to | 8 |
|
