| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] a | 24128 |
|
| 2 | [is] [adv] a | 16252 |
|
| 3 | [is] usually [art] | 541 |
|
| 4 | [be] usually a | 413 |
|
| 5 | [is] usually a | 318 |
|
