| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] [vb pp] at the time of | 6 |
|
| 2 | [am/are] [vb pp] at the time of | 6 |
|
| 3 | [am/are] [vb pp] at the time [prep] | 6 |
|
| 4 | are [vb pp] at the time [prep] | 6 |
|
