1. “SHOULD I SAY ‘IF YOU HAVE ANY QUESTION’ OR ‘IF YOU HAVE ANY QUESTIONS’?”
“应该说‘IF YOU HAVE ANY QUESTION’还是‘IF YOU HAVE ANY QUESTIONS’？”
“If you have any questions” is correct, because the word “question” is a countable noun.
“If you have any questions”正确，因为“question”这个名词可数。
When a noun is countable, we always use the plural form after “some” and “any”:
I bought some flowers.
We don’t have any questions.
We only use the singular form after “some” and “any” when a noun is uncountable:
I bought some sugar.
We don’t have any advice.
2. “WHAT’S THE DIFFERENCE BETWEEN HAVE BEEN + -ING AND HAVE BEEN + PAST PARTICIPLE?”
“HAVE BEEN + -ING和HAVE BEEN + 过去分词之间有什么区别？”
Have been + ING form is the present perfect continuous.
Have been + ING形式是现在完成进行时。
It means an action that has started in the past and continues until the present.
I’ve been cleaning the house for the past hour.
(I started cleaning 1 hour ago, and I’m still cleaning now)
Have been + past participle is the present perfect passive.
Have been + 过去分词是现在完成时的被动语态。
It means something was done to the subject of the sentence sometime in the past.
These machines have been cleaned.
(The sentence doesn’t say who cleaned them, just that they have been cleaned already)
3. “WHEN SHOULD I USE FEW VS. A FEW?”
A few usually has a positive connotation, and few usually has a negative connotation.
Let’s say I’m moving to a new city, and I say “I have a few friends there.” – that’s a good thing; I know some people so I will have a good time in the new city.
比如我搬到了一座新的城市，然后我说“I have a few friends there”，就是一件好事，说明我认识一些人，所以我会在这个新的城市过得开心。
Now let’s say my son is not very popular in school. I would say, “He has few friends.” – that’s a bad thing; he has only 2-3 friends, and it would be better for him to have more friends.
现在我们假设我的儿子在学校不太受欢迎。我会说“He has few friends”，就是一件坏事，说明他只有两三个朋友，而有更多朋友会更好。
4. “WHAT’S THE DIFFERENCE BETWEEN I’VE GOT AND I’VE GOTTEN?”
“I’VE GOT和I’VE GOTTEN有什么区别？”
I’ve got = I have; I possess
I’ve got = 我拥有
I’ve got to = I must; I need to
I’ve got to = 我必须，我需要
(often pronounced as “I’ve gotta”)
I’ve got to leave now.
I’ve got to pay rent on the 1st of the month.
I’ve gotten = I have obtained/received
I’ve gotten = 我应得/获得了
I’ve gotten = I have become
I’ve gotten = 我变成了
I’ve gotten a dog.
(I didn’t have one before, but recently I adopted or bought a dog)
I’ve gotten a good grade on the test.
(I received a good grade on the test)
I’ve gotten divorced.
(I have become divorced)
I’ve gotten better at English.
(I have become better at English)
5. “DO NEITHER & NONE USE SINGULAR OR PLURAL VERBS?”
Neither is used for two things.
Neither of my parents is retired.
None is used for three or more things.
None of the kids in the class failed the test.
About singular or plural, this depends.
Technically, after neither, we should always use the singular, as in the example above
理论上讲，neither之后必须用第三人称单数，像上面那个例子(Neither of my parents is retired / Neither my mom nor my dad is retired.)
However, some people do use the plural
Neither of my parents are retired; Neither of the athletes were injured.
After none, use the plural if the object is countable:
None of the facts are correct.
Use the singular if the object is uncountable:
None of the information is correct.