Genders are usually determined by the sound of the ending of the word. There are always exceptions, but for example, words finishing in "ET" are masculine (like un objet, un navet, etc.) and words in "ETTE" are feminine (like une crevette, une assiette, etc.) It's better to learn words with the article "un" (masculin) and "une" (féminin), as "le" and "la" have a flaw : if the word starts with a vowel, we use l' regardless of the gender - therefore you won't learn the gender for all words starting with a vowels (and there are plenty of those).

Hello, How do you know in english is the verb is regular or iregular ? You have to learn it right ? It is the same here you need to learn each new word if it's masculin or feminin. Bon courage !

Dear, here you have some rules about how to tell a French word's gender. Most of the time they work, so use them. http://www.learn-french-today.com/gender_of_french_words.html Unfortunately, as your mother tongue is English you'll have to get used to the idea of associating an inanimate noun with feminine or masculine since everything is 'it' in English unless you consider the object to be very important. But you'll get the hang of it.

Unfortunately there is no very quick way to know the gender of all the words. It's a process that takes time and the effort of constantly repeating words (with the definite article). It's very important to say the word out loud so you won't easily forget it and also for accent reduction. Try reading news articles from French websites because there are always great vobabulary words you can learn from them.