यह फ़ॉर्म साफ है।

• यह = this
• फ़ॉर्म = form
• साफ = an adjective meaning clean / clear / neat, depending on context
• है = is

So the structure is literally this form clean is.

Hindi usually puts the verb at the end of the sentence. In a sentence with an adjective, the pattern is often:

subject + adjective + है

So instead of This form is clean, Hindi says:

यह फ़ॉर्म साफ है
literally: this form clean is

That is completely normal Hindi word order.

Although यह is often transliterated as yah, in everyday modern speech it is very commonly pronounced closer to yeh.

So learners often hear:

• यह → yeh

This is the normal spoken form for this.

Yes. In Hindi, यह and वह can work both as:

• demonstratives: this / that
• third-person pronouns: he / she / it / this one / that one, depending on context

So:

• यह फ़ॉर्म साफ है = This form is clean/clear
• यह साफ है could mean This is clean/clear or It is clean/clear, depending on the situation

Hindi does not divide these words the same way English does.

That dot is called a nukta. It changes the sound of the consonant.

• फ is traditionally an aspirated p sound
• फ़ is used to represent an f sound in borrowed words

So फ़ॉर्म is written with फ़ to match the English sound in form.

You may also see फॉर्म written in everyday Hindi. Many speakers use that spelling too, even though फ़ॉर्म is the more precise spelling for the f sound.

It is a borrowed word, ultimately from English form, but it is very common in Hindi. Hindi uses many everyday loanwords, especially for modern objects, offices, education, and bureaucracy.

So फ़ॉर्म is perfectly natural Hindi in real life.

Some Hindi adjectives change for gender and number, but some do not.

• Changing adjective: अच्छा / अच्छी / अच्छे
• Non-changing adjective: साफ

साफ is an invariable adjective, so it stays the same with masculine, feminine, singular, and plural nouns.

Examples:

• कमरा साफ है = The room is clean
• किताब साफ है = The book is clean/clear
• फ़ॉर्म साफ है = The form is clean/clear
• फ़ॉर्म साफ हैं = The forms are clean/clear

Only the verb may change; साफ does not.

Because यह फ़ॉर्म is singular.

• है = singular is
• हैं = plural are (and also used for respect)

So:

• यह फ़ॉर्म साफ है = This form is clean/clear
• ये फ़ॉर्म साफ हैं = These forms are clean/clear

In common usage, फ़ॉर्म is usually treated as masculine.

You can see that more clearly with a changing adjective:

• यह फ़ॉर्म नया है = This form is new

If it were feminine, you would expect नई instead of नया.

In your sentence, you cannot tell from साफ, because साफ does not change.

साफ has a wider range than just physical clean. Depending on context, it can mean:

• clean
• clear
• neat
• legible
• plain / obvious

So with something like a form or document, साफ may mean:

• physically clean
• neatly written
• easy to read
• clearly filled out

The exact nuance comes from context.

In everyday speech, many speakers use ये for singular this as well, especially in conversation.

So you may hear:

• ये फ़ॉर्म साफ है

But in careful standard written Hindi:

• यह = singular this
• ये = plural these

So for learning formal standard Hindi, यह फ़ॉर्म साफ है is the best form to use.

In full standard sentences, you normally keep है.

So the normal sentence is:

• यह फ़ॉर्म साफ है

You might see the verb omitted in:

• notes
• labels
• headlines
• very casual speech

But for learners, it is safest to include है unless you have a specific reason not to.