N4 — outside your level filter
Is said whole, with nothing composed onto it and takes no だ/です, so there are no forms to conjugate.
お湯が沸く
oyugawakufor water to boilN4expression
Example sentences2
このやかんは早くお湯が沸くので便利です。
kono yakan wa hayaku oyu ga waku node benri desu.
This kettle is convenient because the water boils quickly. neutral
このやかん、お湯が沸くの早いね。
kono yakan, oyu ga waku no hayai ne.
This kettle boils water fast, doesn't it. casual