| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what we need to do [is] | 7 |
|
| 2 | [adv] what we need to do [is] | 7 |
|
| 3 | so what we need to do [is] | 5 |
|
| 4 | so what we need to do [is] | 5 |
|
| 5 | what we need to do [is] [verb] | 21 |
|
| 6 | what we need to do [is] [vb infin] | 10 |
|
| 7 | what we need to do [is] [to-vb] | 10 |
|
