Page 162 - Basic Japanese

Ame ga futta kara, uchi ni imashita.
Because it rained, I stayed home.

Occasionally you will hear a polite form used somewhere

other than at the end of the sentence. For instance,
someone may say:

Ame ga furimashita kara, uchi ni imashita.
Because it rained, I stayed home.

In fact, before the particle ga meaning ‘but, and,’ the

polite form is the usual thing. And before the particle
keredomo ‘but, however,’ many people prefer to use the

polite form.
The moods that occur at the end of a sentence are

limited to the imperfect, perfect, and tentative. But within a
sentence, there are a number of other moods, such as the

gerund (see 3.9) and the infinitive (see 4.3, 4.5, 4.6, and
4.8). Here are some examples of the use of plain and polite

forms within sentences:

Samui to kansetsu ga

itamimasu.

When it’s cold, my joints hurt.

Tsukareta kara, mō nemasu.
I’m tired, so I’ll go to bed now.