つまが 病気のとき、会社を休みます。

[WhiteDay]

こんばんわ,

I'm just starting to learn about とき [when...]
Then I came across this sentence, and have a little question on the use of 病気.

As far as I understand, it acts as a noun describing 'condition or state' of the subject, the same way like 雨 or ゆき do.

The use that I understand:
- 今日は 雨です。
- わたしは 病気です。

So in this case of つまが 病気のとき、会社を休みます。 why is it not つまは 病気のとき、 ？ As to my understanding, が is used with an adjective, or when you say you "have" something.

Please advise, thanks a lot in advance
ありがとうございます

WhiteDay.

[RadioKid]

I understand that "が：GA" is used in the sub-sentense. When you use "は：WA" is used like "つまは 病気のとき、(わたしは)会社を休みます", listener will confused which of つま or わたし is the subject of the sentence.

Sorry for late reply. I did not find this question.