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

【分析】首先明确be going to是一般将来时的常用结构，用于表示计划打算做某事，或根据现有迹象预测将要发生的动作。解题时需根据主语确定be动词（am/is/are），再结合句式调整结构：肯定句为“主语+be+going to+动词原形”；否定句为“主语+be+not+going to+动词原形”；疑问句为“Be+主语+going to+动词原形”。
【解析】1. 主语是we，对应be动词用are，肯定句结构，故填are going to have；2. 主语Jane是第三人称单数，be动词用is，否定式加not，故填isn't going to buy；3. 主语是you，疑问句将be动词are提前，后接going to do，故填are; going to do；4. 主语是he，疑问句将be动词Is提前，后接going to，故填Is; going to；5. 主语是it，根据乌云迹象预测下雨，be动词用is，故填is going to rain。
【答案】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
【知识点】be going to的用法、一般将来时结构
【点评】本题考查be going to结构的基础运用，覆盖肯定、否定、疑问三种句式，需掌握be动词随主语的变化规则，是初中英语基础语法题，侧重结构的灵活运用。
【难度系数】0.7