Question 1

Why is the particle が used with 天気 instead of は?

Accepted Answer

The particle が marks 天気 (weather) as the subject of the clause “天気が悪い.” When you’re simply describing a state or condition (the weather is bad), が is the most natural subject marker. Using は would make 天気 the topic, often implying contrast or a known context (e.g. “As for the weather…”), which isn’t the focus here.

Question 2

What does ので mean, and how is it different from から when giving reasons?

Accepted Answer

ので means “because” or “since” and expresses a cause or reason. It sounds softer and more explanatory than から, which is a more direct “because.”  
– ので: Polite, objective, and often used in writing or formal speech.  
– から: Neutral or casual, common in everyday conversation when stating reasons directly.

Question 3

Why is the adjective 悪い directly connected to ので, rather than using the て-form (悪くて)?

Accepted Answer

Adjectives in their plain (dictionary) form can attach to ので to form a reason: 悪いので. If you use 悪くて, you’d more likely be linking two clauses in a sequence (e.g. “It’s bad, and…”). With ので, you’re explicitly stating cause → effect: “Because it’s bad, (I’ll do X).”

Question 4

How would you translate 旅行計画を変えます word by word?

Accepted Answer

旅行計画 (ryokō keikaku) = travel plan(s)  
を = direct-object particle  
変えます (kaemasu) = will change (polite present/future tense)  
So literally: “(I) will change the travel plans.”

Question 5

What nuance does the verb 変えます convey here, and could you use another verb like 変更します?

Accepted Answer

変えます (kaemasu) means “to change” in a general sense and feels natural in everyday speech. 変更します (henkō shimasu) also means “to change” or “to modify,” but has a slightly more formal or bureaucratic tone. Both are correct, but 変えます is more conversational.

Question 6

Why is the verb in the polite ～ます form? Could you use the plain form 変える here?

Accepted Answer

The ～ます form is polite and appropriate in most polite or business contexts. In casual speech among friends, you could say 旅行計画を変える. Using the plain form makes the sentence more informal.

Question 7

Is it possible to omit 天気が or 旅行計画を in a casual context?

Accepted Answer

Yes. In Japanese, you can drop parts that are clear from context.  
– Omitting 天気が: “悪いので、旅行計画を変えます。”  
– Omitting 旅行計画を: “天気が悪いので、変えます。”  
However, be sure the listener knows what you’re referring to. In very informal chat, you might also drop ので and use から or the て-form instead.

tenki ga warui node, ryokoukeikaku wo kaemasu.

Breakdown of tenki ga warui node, ryokoukeikaku wo kaemasu.

Questions & Answers about tenki ga warui node, ryokoukeikaku wo kaemasu.

More from this lesson

Master Japanese — from tenki ga warui node, ryokoukeikaku wo kaemasu to fluency