四、用括号内动词的适当形式填空。
1. Rita often (have) sports after school with his friends.
2. What you often (do) on Saturdays?
3. My brother (answer) the phone now.
4. The cat (eat) now.
5. My sister and I (take) a walk together every evening.

1. has；2. do；do；3. is answering；4. is eating；5. take

1. 句中often是一般现在时的标志词，主语Rita是第三人称单数，动词have需用第三人称单数形式has；2. 句中often是一般现在时的标志词，主语是you，特殊疑问句需借助助动词do，后面动词用原形do；3. 句中now是现在进行时的标志词，结构为“am/is/are + 现在分词”，主语my brother是单数，be动词用is，动词answer的现在分词是answering；4. 句中now是现在进行时的标志词，主语the cat是单数，be动词用is，动词eat的现在分词是eating；5. 句中every evening是一般现在时的标志词，主语My sister and I是复数，动词用原形take。