新模式英语学习指导与练习1
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4. Karen and I
are running
(run) on the playground.
5. They
are wearing
(wear) welding gloves.
6. He
is painting
(paint) a bike.
7. We
are eating
(eat) in the canteen.
8. They
are building
(build) a new factory.
9. She
is reading
(read) books in the classroom.
答案：4. are running
解析：“Karen and I”是复数主语，现在进行时结构为“be动词+动词现在分词”，“be”动词用“are”，“run”的现在分词是“running”，所以填“are running”。
5. are wearing
解析：“They”是复数，现在进行时中be动词用“are”，“wear”的现在分词“wearing”，故填“are wearing”。
6. is painting
解析：主语“He”是第三人称单数，be动词用“is”，“paint”的现在分词“painting”，填“is painting”。
7. are eating
解析：“We”是复数，be动词用“are”，“eat”的现在分词“eating”，填“are eating”。
8. are building
解析：“They”为复数，be动词用“are”，“build”的现在分词“building”，填“are building”。
9. is reading
解析：主语“She”是第三人称单数，be动词用“is”，“read”的现在分词“reading”，填“is reading”。
E 用现在进行时改写句子。
1. He cuts flowers.
He is cutting flowers.
2. She borrows books in the library.
3. They practice in the training room.
4. We weld components in the factory.
答案：2. She is borrowing books in the library.
解析：现在进行时结构为“主语+be动词+动词现在分词+其他”，主语“She”是第三人称单数，be动词用“is”，“borrow”的现在分词“borrowing”，所以改写为该句。
3. They are practicing in the training room.
解析：主语“They”是复数，be动词用“are”，“practice”的现在分词“practicing”，改写为现在进行时句子。
4. We are welding components in the factory.
解析：“We”是复数，be动词用“are”，“weld”的现在分词“welding”，故改写为该句。
F 阅读下列表格，用现在进行时写句子。
NameCut flowersUse a computerMake a fruit saladPaint a car
Eva√
Alex√
Franco√
Karen√
Zack√
1. Eva is cutting flowers.
2. Alex
is using a computer
.
3. Alex and Franco
are using a computer
.
4. Karen
is making a fruit salad
.
5. Zack
is painting a car
.
答案：2. Alex is using a computer.
解析：表格中Alex对应的“Use a computer”有√，现在进行时结构为“主语+be动词+动词现在分词”，“Alex”是第三人称单数，be动词用“is”，“use”的现在分词“using”，所以填“is using a computer”。
3. Alex and Franco are using a computer.
解析：Alex和Franco对应的“Use a computer”都有√，主语是复数，be动词用“are”，“use”的现在分词“using”，故填“are using a computer”。
4. Karen is making a fruit salad.
解析：Karen对应的“Make a fruit salad”有√，主语是第三人称单数，be动词用“is”，“make”的现在分词“making”，填“is making a fruit salad”。
5. Zack is painting a car.
解析：Zack对应的“Paint a car”有√，主语是第三人称单数，be动词用“is”，“paint”的现在分词“painting”，填“is painting a car”。
