Learn Turkish: Elektrikli araba kullanıyorsan, şehir içinde ne kadar harcıyorsun? - If you are using an electric car, how much do you spend in the city?

The phrase ne kadar means 'how much' or 'how long' and can act directly as the object of the verb. Because the verb harcıyorsun (you are spending) strongly implies money or battery charge in this context, you do not need to add a specific word like 'money' or 'electricity' after ne kadar.

How does the word kullanıyorsan break down to mean 'if you are using'?

It stacks two grammar structures you have learned. It combines the present continuous suffix -ıyor (are using) with the conditional suffix -sa (if) and the personal ending -n (you). Together, kullan-ıyor-sa-n translates to 'if you are currently using'.

The dictionary form of the verb to spend is harcamak. Why is it spelled harcıyorsun here?

This happens because of a rule called vowel narrowing. When a verb root ends in a wide vowel like -a or -e (like harca-), and you add the -ıyor suffix, that final wide vowel narrows to -ı, -i, -u, or -ü. So, harca becomes harcı- before adding -yorsun.

Why does the sentence use şehir içinde instead of just saying şehirde for 'in the city'?