高中英语连词填空「15题+解析版」:for / since / now that 一次分清!

   连词虽小，却是英语句子的「逻辑胶水」——

   填错一个，时间变因果、因果变条件，分数悄悄溜走

   as / because / before / since / till / until / when / while / now that…

    建议：先闭卷做 15 题 → 再对照解析标错因 → 收藏复盘

    适合高一巩固、高二复习、高三语法填空抢分

Ⅰ.选用适当的连词填空

as，as soon as, because, before, for, now that, since, till, until, when, while

1．He must have gone to sleep, ________ the light in his room is out.

2．I'll go on with the work ________ I come back tomorrow.

3．It will not be long ________ you become an excellent reporter.

4．________ you like the car so much, why not drive it back?

5．Tom picked up French ________ he was in France. 

6．________ Tom is the eldest child in the family, he looks after the others.

7．He didn't follow his father's advice on working in his hometown ________ he had made his decision to go abroad.

8．________ you have understood it, I won't repeat it.

9．We were watching an interesting TV program ________ suddenly the electricity went off.

10．________ you've got a chance to go abroad for further study, why not seize it? 

11．Lucy was so pleased ________ her son won first place in the long jump competition.

12．I will tell her the good news ________ she comes back tomorrow.

13．—Everybody is going to climb the mountain. Can I go, too, mum?

—Wait ________ you are old enough, dear.

14．________ they bought the house, the Smiths have been in debt these years.

15．________ we were studying abroad, we learned much about foreign culture and customs.

Ⅰ. 选用适当的连词填空（解析版）

备选词： as, as soon as, because, before, for, now that, since, till, until, when, while

1. He must have gone to sleep, for the light in his room is out.

for 是并列连词，引出补充说明的原因，语气比 because 弱，常用于书面语。

前面是推测（must have gone to sleep），后面是“证据/理由”，用 for 更自然。

2. I'll go on with the work when I come back tomorrow.

when 引导时间状语从句，“当……时”。

此处 when = “在……之后”，强调“明天回来后再继续工作”。

3. It will not be long before you become an excellent reporter.

固定句型：It will not be long before + 句子  

→ “不久之后就会……”。

before 表示“在……之前”，这里指“在成为优秀记者之前，时间不会太久”。

4. Now that / Since you like the car so much, why not drive it back?

now that / since 都可表示“既然”，引出已知、显然的原因。

语气比 because 弱，常用于引出“既然如此，那就……”的推论。

5. Tom picked up French while he was in France.

while 强调“在……期间”，后接持续性动作/状态。

在法国（一段时间）期间学会了法语，用 while 很贴切。

while 还可表示“对比”（如：I like tea while he likes coffee），本题是时间用法。

6. As / Because Tom is the eldest child in the family, he looks after the others.

because 强调直接原因，语气最强。

as 表示“由于”，语气稍弱，多用于句首。

两者在此都可，because 更强调因果逻辑。

7. He didn't follow his father's advice on working in his hometown because he had made his decision to go abroad.

此处是直接原因：没听建议“是因为”已经决定出国。

用 because 最准确，强调因果。

8. Since / Now that you have understood it, I won't repeat it.

since / now that 表示“既然”，引出已知事实。

“既然你已经懂了，我就不重复了”，是典型用法。

9. We were watching an interesting TV program when suddenly the electricity went off.

固定结构：was/were doing ... when ...  

→ “正在做某事，这时突然……”。

when 在此不是“当……时”，而是“这时（突然）”。

10. Now that / Since you've got a chance to go abroad for further study, why not seize it?

同第4题，“既然你有这个机会，为什么不抓住？”

now that / since 均可，now that 更口语化一些。

11. Lucy was so pleased when her son won first place in the long jump competition.

so pleased when ...：“当……时非常高兴”。

when 引导时间状语从句，说明“高兴”的时间点。

12. I will tell her the good news when / as soon as she comes back tomorrow.

when：明天她回来时我就告诉她。

as soon as：“一……就……”，强调“回来后立即告知”。

两者在本题语境中都通顺。

13. Wait till / until you are old enough, dear.

till / until 都表示“直到……为止”。

句首一般用 until，但在口语中 till 也常见。

否定句（wait 可理解为“不要现在做”）中用 till/until 都正确。

14. Since the Smiths bought the house, they have been in debt these years.

since + 一般过去时，主句用现在完成时：典型时间状语从句结构。

表示“自从买房以来，这些年一直负债”。

15. While we were studying abroad, we learned much about foreign culture and customs.

while 表示“在……期间”，后接持续性动作（were studying）。

强调“在国外学习期间，学到了很多……”。

答案：1.for 2.when 3.before 4.Now that/Since 

5．while 6.As/Because 7.because 8.Since/Now that 9.when 10.Now that / Since 11.when 12.when/as soon as 13.till/until 14.Since 15.While