| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] think [det] [modal v] [be] necessary | 6 |
|
| 2 | not think [det] [modal v] [be] necessary | 5 |
|
| 3 | [not/n't] think [det] [modal v] [be] necessary | 5 |
|
| 4 | n't think [det] [modal v] [be] necessary | 5 |
|
