Callan New Edition Stage 9 Lesson 132 on page 728 please start with ''STILL''.

レッスンで出てきた文法・単語	VOCABULARY:  •still •yet •annoyance GRAMMAR  •It is possible to use still" in negative sentences. For example, instead of saying "He hasn't done the work yet". we can say "He still hasn't done the work". This communicates a feeling of surprise or annoyance, and the word "still" is stressed in the sentence. •"Still" can also be used in questions •Sometimes, we use the words "still", or more commonly "even", in a comparative structure in order to communicate that something is surprising.
レッスンで利用した教材	CALLAN NEW EDITION STAGE 9
レッスンで利用した教材のページ数	729-730

stillを否定文や疑問文で使う時に、アクセントを強調すると不快感や驚きを表す。