| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] think to [be] necessary | 8 |
|
| 2 | [be] think [prep] [be] necessary | 8 |
|
| 3 | [be] think [prep] be necessary | 8 |
|
| 4 | [be] think to [be] necessary | 8 |
|
| 5 | [be] thought [prep] [be] necessary | 8 |
|
| 6 | be think [prep] [be] necessary | 8 |
|
| 7 | [was/were] think [prep] [be] necessary | 5 |
|
