| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] an | 3933 |
|
| 2 | be [v-ing] an | 2000 |
|
| 3 | be preparing [art] | 142 |
|
| 4 | be preparing [art] | 142 |
|
| 5 | be preparing a | 106 |
|
| 6 | be prepare an | 17 |
|
| 7 | [be] preparing an | 14 |
|
