Tā shuō kāihuì yǐhòu mǎshàng qù fùxí, wǒ yě yào fùxí.

It’s optional, but adding it is clearer.

• Without it (他说开会以后马上去复习), you’re quoting his words; the subject is understood from context.
• With it (他说他开会以后马上去复习), you explicitly say the subject of the embedded clause is “he,” which avoids ambiguity and is often recommended for learners.

Not required, but very common and natural.

• 就 highlights a tight sequence or natural consequence.
• With 马上, adding 就 often sounds smoother: 他说他开会以后就马上去复习.

Both are fine, but they differ slightly:

• 马上复习: start reviewing right away (no movement implied).
• 马上去复习: go and review immediately (often implies going somewhere or setting off to do it).

要 can mean “intend to,” “plan to,” or “need to,” depending on context.

• If it’s about a plan or schedule, it’s “will/going to.”
• If it’s about necessity, it’s “need to.”
• If you mean “want to,” use 想: 我也想复习.
• For obligation, use 得/必须: 我也得复习.

也 comes right after the subject and before the modal/verb phrase: Subject + 也 + (modal) + Verb.

• Correct: 我也要复习 / 我也复习.
• Incorrect: 我要也复习.

Use broader time first, then immediacy, then the verb: Event-time (开会以后) + immediacy (马上) + action (去复习).

• “开会以后马上去复习” is natural.
• “马上开会以后去复习” is wrong because 马上 should modify the action, not the “after” phrase.

Not mandatory, but each choice slightly shifts nuance:

• 开会以后 usually means “after the meeting (is over)” in context.
• 开了会以后 explicitly marks completion (“after having held the meeting”).
• 开完会以后 is unambiguous: “after finishing the meeting.” This is very clear and common.

Yes. 之后 and 以后 both work here.

• 之后 is a bit more formal/written and ties two events.
• 以后 is more general and can also mean “in the future (from now on).”

It separates two clauses without a conjunction, which is very normal in Chinese.

• “他说……，我也要复习” means “He said …, and I also need to review.”
• You don’t need an explicit “and” such as 而且/并且 here.

Use quotation marks after 他说:

• 他说：“开会以后马上去复习。” You can keep the second clause outside the quotes: 他说：“开会以后马上去复习”，我也要复习。

It can sound ambiguous. To be explicit about telling others, use 让/叫:

• 他让我们开会以后马上去复习 = He told us to review right after the meeting.
• With just 说, it’s typically reporting what he said, not giving an instruction to others.

Yes.

• 我也要马上复习 (I also will/need to review right away) is common.
• 我也马上要复习 emphasizes that the time when you will review is about to arrive (you’re about to need/want to review). Subtle difference, both grammatical.

Yes. 马上就 intensifies the immediacy:

• 他说他开会以后马上就去复习. This is very natural in speech.

Choose the negator by meaning:

• Not going to/doesn’t: 我也不复习.
• Don’t want to: 我也不想复习.
• Don’t need to: 我也不用复习.
• Don’t (imperative): 别/不要复习 (telling someone not to). Avoid 我也不要复习 unless you mean “I also don’t want to (review),” which can sound like refusing.

Place 也 before the negator: Subject + 也 + 不/没 + Verb.

• 我也不复习 / 我也不想复习 / 我也不用复习.
• Not: 我不也复习.

Yes, 开会 is a VO compound (开 + 会). You’ll see:

• 开一个会 (hold a meeting),
• 开会开了两个小时 (the meeting lasted two hours),
• 会议 (the meeting, as a noun) is also common: 会议以后马上去复习.