La asistencia a clase es importante si queremos seguir bien el curso.

No. La asistencia here means attendance, not help or assistance in the English sense.

This is a very common false friend:

• la asistencia a clase = class attendance
• la asistencia médica can mean medical care/assistance, depending on context

So in this sentence, La asistencia a clase means attending class / class attendance.

In Spanish, ir a clase and asistir a clase are very common set expressions meaning to go to class or to attend class in a general sense.

So:

• a clase = to class / to lessons / in class, generally
• a la clase would usually sound more specific, like to the class or to that particular class

Here, the sentence is talking about class attendance in general, so a clase is the natural choice.

Because importante is treated here as a general characteristic, so Spanish uses ser, not estar.

• es importante = it is important as a general fact
• estar is usually used for states or conditions, and estar importante would not sound natural here

So:

• La asistencia a clase es importante = Class attendance is important

Spanish often leaves out subject pronouns because the verb ending already shows the subject.

• queremos = we want
• The -emos ending tells you it is we

So si queremos already means if we want.
Adding nosotros is possible, but usually only for emphasis or contrast:

• si nosotros queremos... = if we want... with extra emphasis

Because after si meaning if, Spanish normally uses the indicative, not the subjunctive, for real or likely conditions.

So:

• si queremos seguir bien el curso = if we want to keep up with the course well

This is the normal pattern:

• Si estudias, aprendes.
• Si queremos aprobar, tenemos que trabajar.

The subjunctive does not usually come directly after si in this kind of sentence.

Because si without an accent means if.

Compare:

• si = if
• sí = yes

So in this sentence:

• si queremos... = if we want...

Here, seguir el curso means to keep up with the course, to follow the course, or to stay on track with what is being taught.

It does not mean literally to continue the course in the most basic sense of seguir.

So:

• seguir bien el curso = to follow the course well / to keep up with the course well

It suggests understanding the lessons and not falling behind.

Yes, both are possible, but they can sound slightly different in focus.

• seguir bien el curso puts the adverb close to seguir, so it emphasizes keeping up well
• seguir el curso bien is also understandable and natural in many contexts

In this sentence, seguir bien el curso is a very normal and idiomatic order.

Yes. Here el curso means the course, the class, or the school subject/programme of study, depending on context.

In Spain, curso is very commonly used for:

• a school or university course
• an academic year, in some contexts

In this sentence, it most naturally means the course you are taking.

Not necessarily. In Spanish, ir a clase and asistencia a clase are often used in the singular to talk about class attendance in general.

So:

• a clase = to class / to lessons, generally
• It does not have to mean just one single lesson

This is similar to how English can say go to school without meaning one specific school session.

Yes, it is natural, especially in formal or academic language.

It sounds a bit more formal than some alternatives. For example:

• La asistencia a clase es importante = more formal, like something a teacher or school might say
• Ir a clase es importante = more direct and everyday

Both are correct, but la asistencia a clase sounds more official or institutional.

Yes. That would change the structure, but the meaning would stay very similar.

For example:

• Asistir a clase es importante si queremos seguir bien el curso.

This means essentially the same thing:

• Attending class is important if we want to keep up with the course

The original sentence uses a noun phrase:

• la asistencia a clase = class attendance

The alternative uses an infinitive:

• asistir a clase = to attend class

Here, a links asistencia with the activity being attended.

• asistencia a clase = attendance at class
• asistencia al trabajo = attendance at work

So this a is part of the normal pattern used with asistencia to show attendance at something.

Yes, but you have to be careful. A literal translation like follow the course well is possible, but in natural English it is often better to say:

• keep up with the course
• follow the course properly
• stay on track with the course

So seguir here has the idea of keeping up with and understanding the progress of the course, not physically following something.

It expresses a general idea of importance rather than a strict obligation.

• es importante = is important
• It sounds like a recommendation or general truth

If Spanish wanted to sound stronger, it might say something like:

• es fundamental
• es necesario
• hay que asistir a clase

So the original sentence is firm, but not the strongest possible way to express obligation.