很高兴能够在这里回答你的问题,
1 Can Tigers really swim?
老虎真会游泳吗?
2 They are reading in the study.
他们正在书房看书.
3 Look,they (are having) an English lesson.
看,他们正在上英语课.
look,看,说明是正在发生的事,所以用现在进行时还有一个哦，你的回答最好了最后一个是They（ aren't watering ) the flowers now. 他们现在没在浇花。 aren't= are not