Ex. 9 Present Continuous. I still (to writе) a letter.
2.It (to snow) now
3.It still (to rain).
4. My mother (to sit) at the table now
5.She (to explain) a grammar rule.
6.They (to eat) soup.
7.They (to play) football.
8.We (to have) dinner now.
9.Who (to speak) with you?
10. Why you (to talk)?​

1) writing

2) is snowing

3) is raining

4) is sitting

5) is explaining

6) are eating

7) are playing

8) are having

9) are speaking

10) are talking

writing,

is snowing,

is raining,

is sitting,

is explaining,

are eating,

are playing,

are having,

are speaking,

are talking

в present continuous прибавляется окончание ing.