| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] think [prep] [be] [adj] | 87 |
|
| 2 | [was/were] [verb] [prep] [be] necessary | 17 |
|
| 3 | [be] think [prep] [be] necessary | 8 |
|
| 4 | [was/were] think [prep] [be] necessary | 5 |
|
