Ⅰ. 完成句子:用 be going to 的固定搭配完成句子
1. We (have) a picnic if the weather is nice.
2. Jane (not buy) a new dress because she doesn't have enough money.
3. What you (do) after school?
4. he visit his grandparents?
5. Look at those dark clouds! It (rain).

1. are; going; to; have
2. isn't; going; to; buy
3. are; going; to; do
4. Is; going; to
5. is; going; to; rain

1. 根据“be going to do sth.（将要做某事）”结构，主语We是复数，be动词用are，have保持原形，所以填are going to have。
2. 主语Jane是第三人称单数，be动词用is，否定形式为isn't，buy保持原形，所以填isn't going to buy。
3. 特殊疑问句结构，主语you，be动词用are，do保持原形，所以填are; going to do。
4. 一般疑问句结构，主语he是第三人称单数，be动词用is且首字母大写，visit保持原形，所以填Is; going to。
5. 主语It是第三人称单数，be动词用is，rain保持原形，所以填is going to rain。