| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been preparing for | 6 |
|
| 2 | [vb past] [be] preparing for | 6 |
|
| 3 | [vb past] [been] preparing for | 6 |
|
| 4 | [vb past] be preparing for | 6 |
|
