| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [prep] the twentieth century | 13 |
|
| 2 | be [verb] [prep] the twentieth century | 13 |
|
| 3 | [be] [vb pp] [prep] the twentieth century | 13 |
|
| 4 | [be] [verb] [prep] the twentieth century | 13 |
|
| 5 | [be] [verb] in the twentieth century | 8 |
|
| 6 | [was/were] [verb] [prep] the twentieth century | 5 |
|
