यह प्लान अच्छा है।

• यह = this
• प्लान = plan
• अच्छा = good
• है = is

So the structure is basically this plan good is, which is normal Hindi word order.

Hindi usually puts the verb at the end of the sentence. English says:

• This plan is good.

Hindi prefers:

• This plan good is.
• यह प्लान अच्छा है।

This is a very common pattern in Hindi, so seeing है at the end is completely normal.

Hindi does not usually use articles like a, an, and the the way English does. So:

• अच्छा प्लान can mean a good plan or the good plan, depending on context.
• In this sentence, यह already makes it specific: this plan.

So nothing is missing; Hindi just works differently from English here.

अच्छा changes form to agree with the noun’s gender and number in many common uses.

Here, प्लान is normally treated as masculine singular, so the adjective is:

• अच्छा = masculine singular

Compare:

• अच्छा प्लान = good plan
• अच्छी योजना = good plan/good scheme, if using the feminine noun योजना
• अच्छे प्लान = good plans

So अच्छा is used because प्लान is being treated as masculine singular.

Yes. प्लान is a very common borrowed word from English, especially in everyday speech.

A more native/Sanskrit-based option is:

• योजना

So you could also hear:

• यह योजना अच्छी है।

Both are correct, but प्लान sounds more conversational and modern in many contexts.

In careful Hindi, यह is often described as yah.

In everyday speech, many speakers pronounce it closer to:

• yeh
• or even ye in very natural conversation

So all of these are related to the same word, but for learners, yeh is usually a helpful pronunciation guide.

Yes, depending on context.

In this sentence, यह clearly means this because it comes before a noun:

• यह प्लान = this plan

But यह can also act like a pronoun:

• यह अच्छा है। = This is good / It is good

So the role of यह depends on whether a noun follows it.

Yes. That is also natural.

Compare:

• यह प्लान अच्छा है। = This plan is good.
• यह अच्छा प्लान है। = This is a good plan / This is a good-quality plan.

Both are correct, but the focus shifts slightly.

• यह प्लान अच्छा है comments on the plan
• यह अच्छा प्लान है makes good plan into a noun phrase

In everyday use, both are common.

The symbol । is called the danda. It is the traditional Hindi sentence-ending mark, similar to a full stop.

So:

• यह प्लान अच्छा है।

means the same as if you saw a period at the end. In modern informal writing, especially online, people sometimes use . instead, but । is the standard Devanagari punctuation mark.

In standard written Hindi, the usual distinction is:

• यह = this
• ये = these

So formally, for singular this plan, you would write:

• यह प्लान अच्छा है।

However, in everyday spoken Hindi, many speakers pronounce यह as ये, so you may hear something that sounds like:

• ये प्लान अच्छा है

That is common in speech, but for standard learning and writing, यह प्लान अच्छा है। is the safer form.

अच्छा is usually pronounced roughly like ach-chhaa.

A few points:

• The च् + छ cluster gives a doubled/choppy sound in the middle.
• The last ा gives the aa sound.
• The च्छ part is often the trickiest for English speakers.

A simple learner-friendly approximation is:

• uhch-chhaa

You do not need perfect pronunciation right away; just make sure it sounds closer to achchha than to plain acha in English spelling.

Sometimes in casual speech, yes, but as a learner you should normally keep it.

• Full sentence: यह प्लान अच्छा है।
• Casual shortening: यह प्लान अच्छा।

The shortened version may be heard in conversation, especially when people are speaking quickly or informally, but it is not the best default for learners. Using है is clearer and grammatically complete.