| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's your [noun] | 489 |
|
| 2 | it 's your [noun sg] | 469 |
|
| 3 | it 's [pron] birthday | 58 |
|
| 4 | it 's [pos pn] birthday | 58 |
|
| 5 | it be your birthday | 29 |
|
| 6 | it [be] your birthday | 29 |
|
| 7 | it [is] your birthday | 24 |
|
| 8 | it 's your birthday | 21 |
|
| 9 | [pers pn] 's your birthday | 21 |
|
| 10 | [pron] 's your birthday | 21 |
|
| 11 | it 's your birthday | 21 |
|
| 12 | it 's your birthday | 21 |
|
