| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | while they [be] [v-ing] for | 11 |
|
| 2 | while they be [v-ing] for | 11 |
|
| 3 | while they [be] waiting for | 7 |
|
| 4 | while they [was/were] [v-ing] for | 6 |
|
| 5 | while they were [v-ing] for | 6 |
|
| 6 | while they [am/are] [v-ing] for | 5 |
|
