هذه الصفقة جيدة.

A word-for-word breakdown is:

• هذه = this (feminine singular)
• الصفقة = the deal
• جيدة = good

So the literal order is something like this the-deal good, but natural English is This deal is good.

Because الصفقة is a feminine singular noun, and the demonstrative has to match it.

• هذا = this for masculine singular nouns
• هذه = this for feminine singular nouns

So:

• هذا الكتاب = this book
• هذه الصفقة = this deal

A very common clue is the ending ة (called taa marbuuTa). Many nouns ending in ة are feminine, and صفقة is one of them.

Because صفقة is feminine, other words connected to it also show feminine agreement, such as:

• هذه instead of هذا
• جيدة instead of جيد

In Arabic, adjectives normally come after the noun, not before it.

So:

• صفقة جيدة = a good deal
• literally: deal good

English says good deal, but Arabic says deal good.

In this sentence, جيدة is functioning as the predicate adjective, but the result is still that it comes after the noun phrase.

Because adjectives in Arabic must agree with the noun they describe in gender.

Since صفقة is feminine, the adjective must also be feminine:

• masculine: جيد
• feminine: جيدة

So:

• كتاب جيد = a good book
• صفقة جيدة = a good deal

In Arabic, the present tense of to be is usually not expressed with a separate word in simple sentences like this.

So:

• هذه الصفقة جيدة literally looks like this deal good
• but it means This deal is good

This is called a nominal sentence. In the present tense, Arabic normally leaves out is/am/are.

If you wanted the past tense, then Arabic would use a verb, for example:

• كانت هذه الصفقة جيدة = This deal was good

Because جيدة here is the predicate: it tells you something about the deal.

• هذه الصفقة جيدة = This deal is good

If you say هذه الصفقة الجيدة, then الجيدة becomes part of the noun phrase itself:

• هذه الصفقة الجيدة = this good deal

That is not the same as a full statement. It is just a noun phrase unless more words follow.

So the difference is:

• هذه الصفقة جيدة = complete sentence, This deal is good
• هذه الصفقة الجيدة = noun phrase, this good deal

They are similar, but not identical.

• هذه الصفقة جيدة = This deal is good
• هذه صفقة جيدة = This is a good deal

In the first sentence, هذه الصفقة means this deal as a definite subject.

In the second sentence, هذه stands more on its own as this, and صفقة جيدة is an indefinite predicate meaning a good deal.

So the presence or absence of ال changes the structure.

Because ص is a sun letter. When ال comes before a sun letter, the l sound is not pronounced; instead, the following consonant is doubled.

So:

• written: الصفقة
• pronounced: aṣ-ṣafqa (roughly)

This is why you hear a stronger ṣ sound rather than al-s...

The fully vowelled form is:

هَذِهِ الصَّفْقَةُ جَيِّدَةٌ

In full grammatical reading, the endings show case:

• الصَّفْقَةُ
• جَيِّدَةٌ

But in normal everyday reading and speech, these short case endings are often not pronounced clearly, especially at the end of a sentence.

About ة:

• at the end of a paused word, it usually sounds like -a or -ah
• when grammatical endings are fully pronounced, or in certain constructions, it can sound like t

So in natural pause, learners often hear something like:

hādhihi aṣ-ṣafqa jayyida

rather than a strong final t sound.