“Vous les oublierez.”
I don’t understand why there is a “les” in this sentence. The English translation is: “you will forget them.” why the french express this meaning like "you, the, forget(verb). I’m confused. or this is something about future tense perhaps?
vous = you
les = them
oublierez = will forget
You them will forget (word order in French) —> You will forget them (word order in English)
In French, sometimes the object of the sentence, in the above case “them”, comes before the verb and sometimes after, depending upon whether you are referring to an indirect object to direct object.
Je pense à lui —> I am thinking of him
Je lui parle ----> I am speaking to him
Le, la and les are pronouns when they come before the verb, meaning him, her and them respectively, agreeing with the gender of the noun they subsitute.
E.g. Je le mange = I eat it.
Je l’ai lu = I have read it.
Je peux les voir = I can see them.
They are direct object (accusative) pronouns only. The indirect object versions are lui and leur for ‘to him’, ‘to her’ (both lui in this case) and ‘to them’, but they also appear before the verb. As 2Maria says, there are cases they come after the verb, but the form can change.
Pronouns, and their interactions with verbs, are quite a complicated bit of French grammar.
As an aside, if it seems strange that the word for ‘the’ should mean ‘him’, ‘her’, etc., ‘le’ and ‘la’ come from the Latin ‘ille’ and ‘illa’ meaning ‘that man’ and ‘that woman’. So it makes sense that they can also be used as pronouns.
Vous les oublierez.
这个句子的主语是Vous、谓语是oublierez，宾语是les。
les是法语中表示“他们、她们、它们”的直接宾语代词。
oublierez是法国的简单将来时中对应vous的形式。
所以这个句子的意思是，您将忘记它们。
在法语中，如果宾语是代词，一般都要放在相关动词的前面。
比如说，我爱他们，就要说成：Je les aime.
Thank you all. Everything became so clear and make sense after I learned more Michel Thomas course. This question is so basic. I probably should have tried harder to look up answer on the internet first. Anyway, as strange as it seems to me, it’s interesting to know verb, object order in French is a bit like Japanese, “I this apple eat.”
LingQ community is so wonderful because you guys. thanks.
Well not exactly!
You do not say “I this apple eat” in French but rather “I eat this apple” or even better in English, “I’m eating this apple”.
In French you would say:
Je mange cette pomme.
je = I
mange = eat
cette = this
pomme = apple
Your question above related to the pronoun not the noun. Hence in French, if you wanted to say, I’m eating it or simply, I eat it you would say:
je la mange
je = I
la = it, feminine pronoun for a feminine noun, in this case the apple
mange = eat.
You were half way there! 
Well done ^^