هذه دورة مسائية.

هذه means this when referring to a feminine singular noun.

Here, the noun is دورة (course), which is feminine, so Arabic uses هذه, not هذا.

• هذا = this (masculine)
• هذه = this (feminine)

So هذه دورة... means This is a course...

Because دورة is a feminine noun.

In Arabic, demonstratives like this must agree with the gender of the noun:

• هذا كتاب = This is a book. (كتاب is masculine)
• هذه دورة = This is a course. (دورة is feminine)

Even if the English translation just says this, Arabic makes a gender distinction.

A very common sign of a feminine noun in Arabic is the ending ـة (called taa marbuuTa).

So دورة is feminine because it ends in ـة.

This does not mean every feminine noun ends this way, but it is one of the most common patterns.

مسائية is an adjective describing دورة.

So:

• دورة = course
• مسائية = evening / evening-related

Together, دورة مسائية means an evening course.

Arabic adjectives usually come after the noun they describe, unlike English, where adjectives usually come before:

• English: an evening course
• Arabic: course evening

Because Arabic adjectives must agree with the noun they describe.

Since دورة is:

• feminine
• singular
• indefinite

the adjective مسائية must also be:

• feminine
• singular
• indefinite

That is why you see مسائية rather than a masculine form.

In present-tense Arabic sentences like this one, the verb to be is usually not written or spoken.

So Arabic says:

• هذه دورة مسائية

literally something like:

• This evening course

but it naturally means:

• This is an evening course

This is completely normal in Arabic. The implied is is understood.

Because the sentence means This is an evening course, not This is the evening course.

In this sentence:

• هذه = this
• دورة مسائية = an evening course

The noun phrase is indefinite, like English a course, not the course.

If you said:

• هذه الدورة المسائية

that would mean This is the evening course or this evening course, referring to a specific known course.

So the version without الـ is correct for the meaning This is an evening course.

A careful pronunciation would be approximately:

dawrah masaa’iyyah

A few notes:

• دورة sounds like daw-rah
• مسائية comes from مساء (evening) and includes a glottal stop from the ء
• The ending ـية here gives a sound like -iyyah

So the full sentence is approximately:

haadhihi dawrah masaa’iyyah

In slower, fully careful MSA pronunciation, the final case endings may also be pronounced, but in everyday careful speech they are often not emphasized.

The ending ـة is called taa marbuuTa.

Usually:

• when you stop at the end of a word, it sounds like -a or -ah
• when grammar endings are pronounced in connected speech, it can sound like a t

So:

• دورة is usually pronounced dawrah when said on its own
• in very formal fully vocalized grammar pronunciation, it may be part of a form pronounced with t

For beginners, it is usually safest to think of ـة at the end of a paused word as sounding like -ah.

مسائية is derived from مساء, which means evening.

It is an adjectival form meaning something like:

• evening-related
• held in the evening
• evening

So دورة مسائية is an evening course, just as Arabic can form similar adjectives from other nouns.

It is a complete sentence.

The structure is:

• هذه = the subject-like element (this)
• دورة مسائية = the predicate (an evening course)

So it works as a full nominal sentence in Arabic, even without a word for is.

For the meaning This is an evening course, هذه دورة مسائية is the normal and natural order.

If you change the order, the sentence may become less natural, change emphasis, or require a different structure.

For a learner, the best model to remember is:

• هذه + noun + adjective

So:

• هذه دورة مسائية = This is an evening course