French language Q&A Forum

Im just a bit confused since, i am trying to learn french and on the 7th or 8th question, it said hand sanitizer is gel hydracoolique, but ive never heard such a word! I dont know, im just a bit confused since, for new people at french, this word (i dont think) shouldn't be used, since i am getting better and better each day, but again, ive never heard this word, nor seen it, for that matter. I dont want to be a pain, but i think this shouldn't be used.

The phrase in English was "I will introduce her to Amelie" (sorry I don't have accents).  The translation given is je lui presenterai Amelie which I take to mean "I will introduce Amelie to her".  Should it not be "je la presenterai a Amelie"?

Leave my sister alone! 

Would Laissez-la! Carry a greater sense of gravity than Laisse-la! ?  

Hi I don't understand why "Tous les enfants partent mais aucun ne prend le train"  is correct but 

:Tous les enfants partent mais aucun d’entre eux ne prend le train" is not.   

THE LESSON SAYS: We can also express none of them using aucun d'entre eux ne ... / aucune d'entre elles ne ..., I understand "aucun d’entre eux/elles" is used with people and les enfants are people. Thanks.

In the following sentence - C'est ma sœur., c'est is not followed by un/une/la/le/les then why cant we use elle est?

Pendant des années, je me suis plié en quatre pour arranger les choses entre nous...

t's describing something habitual that happened over a long period of tim.  It's in the middle of a longer passage also in the imparfait setting the scene for a discrete action to come....  

Thanks in advance for the insights I know you will provide.