| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not need to be | 187 |
|
| 2 | [vb -s] not need to | 72 |
|
| 3 | [vb -s] not to be | 63 |
|
| 4 | [vb -s] need to be | 32 |
|
