For the pronunciation, in "nosi" the s sounds like /sh/ but in "sukienkę" it sounds like /s/. Is this the normal rule for Polish?
Yes, the rule is that consonant get palatalized with" i". Check out this sounds in the words we already had in this course: the sound "ci" in the word ciasteczka http://forvo.com/word/ciasteczka/#pl the sound "ni" in the word oni http://forvo.com/word/oni/#pl the sounds "dzi" and "ci" in the word dzieci http://forvo.com/word/dzieci/#pl the sound "zi" in duzi http://forvo.com/word/duzi/
The sound "si" (longer) or "ś" (shorter) don't exist in English and it's bit different than sz /sz/. It's very soft. Check out in those words: śnieg (snow): http://forvo.com/word/%C5%9Bnieg/#pl śmiech (laughter) http://forvo.com/word/%C5%9Bmiech/#pl siostra http://forvo.com/word/siostra/#pl
"nosić" in 3rd (on/ona/ono - he/she/it) singular form is "nosi". "noszę" is 1st singular form.
Isn't "she wears a dress" the same as "she is wearing a dress", which was cosidered incorrect as my answer.
Unfortunately it's just going to take constant repetition to make the word sink in. If you're having trouble with a bunch of words, I'd recommend picking up a Memrise course or an Anki deck. Good luck!
I could swear the tts is pronouncing "sukienkę" the same way as "sukienka", is it right? I also decided to check on forvo (https://forvo.com/word/sukienkę/#pl) and it seems to me the ponunciation sounds like "sukienką" there. Am I mishearing things? How to pronounce it right? I am confused.
I hear a plain "e" at the end, which is a normal way of pronouncing "ę" at the end of a word. Otherwise, it's more like "eu" (Spanish "Europa", for example). It's a nasalized "e".
And the forvo link makes the "ę" sound clear.