| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 's [be] [v-ing] for three | 5 |
|
| 2 | 's [been] [v-ing] for three | 5 |
|
| 3 | 's been [v-ing] for three | 5 |
|
| 4 | 's be [v-ing] for three | 5 |
|
