| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] has be [v-ing] [prep] | 8 |
|
| 2 | a [noun sg] has [been] [v-ing] [prep] | 8 |
|
| 3 | a [noun sg] has been [v-ing] [prep] | 8 |
|
| 4 | a [noun sg] has [be] [v-ing] [prep] | 8 |
|
