53.She’ s running.(改为一般疑问句)

　 　　　　she 　　　　?

52.My sister and I are cleaning our room.(对划线部分提问)

　 　　　　are your sister and you 　　　　?

51.Are they having lunch at home now?(用every day替换now)

　 　　　　they　　　 lunch at home　　　 　　　　?

50.Tom wants to go to the movies.(改为一般疑问句)

　　　　　 Tom 　　　　to go to the movies?

49.She plays the piano in the morning.(用now替换划线部分)

　 She 　　　　　　　　　the piano 　　　　.

48.Is she eating an orange?(作否定回答)

　 　　　　, she 　　　　.

47.Linda is writing a letter to her parents.( 改为否定句)

　Linda 　　　　　　　　　　　a letter to her parents.

46. They often draw pictures in the evening.(用now改写句子)

　 They 　　　　　　　　　　pictures now.

5. time表示不可数名词，意为“时间”。

　　　 表示可数名词，意为“次数，倍数”。

　　　 eg：What time is it?

　　　 Time and tide never wait for men.

　　　 I go to the movies three times a week.

　　　 The size of the new museum is four times larger than the old one.

　　　 注意“次数”的表达方法

　　　 一次 once

　　　 两次 twice

　　　 三次或三次以上用基数词加上times，three times、five times、one hundred times.

　　　 表示“……几次”的表达方法是：twice a month、once a month、three times a week、once a year.

4. 疑问词how的用法

　　　 (1)怎样，用什么手段，方法。

　　　 How did he do it?

　　　 I don’t know how to swim.

　　　 (2)情况如何(指身体健康状况)

　　　 How are you?

　　　 How’s it going with Tom?

　　　 (3)how many，how much表示“多少”

　　　 how many后接可数名词复数，how much接不可数名词。

　　　 How many times do you go to the park?

　　　 How many tickets do we need?

　　　 How much water is there?

　　　 How much are those pants?

　　　 (4)how often是对动作发生的“次数”提问

　　　 eg：How often do you play tennis?

　　　 How often do you surf the internet.