What it means
は〜が presents a topic with は and then identifies a feature, ability, state, or other fact about that topic with が. It often contrasts the stated topic with another person or thing, either explicitly or by implication. The first noun is the overall topic, while the noun before が is the subject of the following description. The topic and the subject marked by が can refer to different parts of the same situation.
Usage note
Do not assume that が in this pattern is contrastive. は usually marks the topic and が usually marks the subject or object of the following predicate. The contrast may be understood from context rather than stated directly.
How to use it
姉は髪が長いです。
My older sister has long hair.
姉は髪が長い。
My older sister has long hair.
Example sentences
このかばんはポケットが多いです。
This bag has many pockets.
この町は春の景色が美しいです。
As for this town, the spring scenery is beautiful.
姉は料理が上手です。
My older sister is good at cooking.
この学校は校庭が広いです。
This school has a spacious schoolyard.
私