| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] do [be] | 1800 |
|
| 2 | need do [be] | 176 |
|
| 3 | [vb infin] do [be] | 133 |
|
| 4 | need [verb] [be] | 28 |
|
