Practise the use of these two words: some or any! Some in affirmative sentences and polite questions where you expect/hope the answer to be "yes". Any in negative sentences and in questions. http://efl-fle-chezvous.monsite-orange.fr/
I’m British and have been living and teaching English in France since 1981. Once I became bilingual I started teaching French. Having had to learn that language myself helped me anticipate the difficulties my students would face.