Why is "ashita kaerimasu" not "ashita wa kaerimasu"? is the particle wa being omitted or is it not necessary?


The sentence

> Ashita **wa** ame ga furu deshou

uses a "wa" after _ashita_. But the sentence

> Ashita kaerimasu

doesn't. Why is that? Is it being omitted or would it be wrong to say

> ashita **wa** kaerimasu

?




> **あした{ashita}は{wa}** あめ{ame}が{ga} ふ{fu}る{ru}で{de}しょう{syou}。

It has は because あした is the theme/subject of the predicate/sentence.

> **あした** 、かえり{kaeri}ます{masu}。

Here, あした is an adverb. It's just saying 'when.'

If you say

> あした **は** かえります

あした becomes the theme/subject of the sentence. You can say this, too. It's no
problem. Just it sounds like comparing with something, maybe comparing with
きょう (today), or きのう (yesterday).

* * *

[Reply to additional request]

あした、かえります sounds simple; ex. "I'll be/go/come back/home tomorrow."

あしたはかえります most likely does not say someone or something named あした goes back.
The action maker of かえります is someone you can tell from the context. It could
be "(Sorry that I couldn't leave here by now, but) I'll come back tomorrow" or
"(I enjoyed the sightseeing today.) Tomorrow, I'm going home."




> **あした{ashita}は{wa}** あめ{ame}が{ga} ふ{fu}る{ru}で{de}しょう{syou}。

It has は because あした is the theme/subject of the predicate/sentence.

> **あした** 、かえり{kaeri}ます{masu}。

Here, あした is an adverb. It's just saying 'when.'

If you say

> あした **は** かえります

あした becomes the theme/subject of the sentence. You can say this, too. It's no
problem. Just it sounds like comparing with something, maybe comparing with
きょう (today), or きのう (yesterday).

* * *

[Reply to additional request]

あした、かえります sounds simple; ex. "I'll be/go/come back/home tomorrow."

あしたはかえります most likely does not say someone or something named あした goes back.
The action maker of かえります is someone you can tell from the context. It could
be "(Sorry that I couldn't leave here by now, but) I'll come back tomorrow" or
"(I enjoyed the sightseeing today.) Tomorrow, I'm going home."

