Word Formation Rules

TOEFL Preparation Series: Master Affixes and Parts of Speech

💡 Core Concept: Pembentukan Kata

Dalam tes TOEFL, Anda sering diminta untuk mengidentifikasi apakah sebuah kata berada dalam bentuk kelas kata (*Part of Speech*) yang benar. Strategi terbaik adalah dengan mengenali Suffixes (akhiran) yang menentukan kelas kata tersebut.

Part of Speech	Common Suffixes (Akhiran Umum)	Examples
Noun (Kata Benda)	-tion, -ment, -ness, -ance, -ity, -ship	Creation, Development, Happiness, Ability
Verb (Kata Kerja)	-ize, -ify, -ate, en- (prefix)	Maximize, Clarify, Create, Enlarge
Adjective (Sifat)	-ful, -less, -able, -ive, -ous, -ic	Beautiful, Careless, Capable, Creative, Famous
Adverb (Keterangan)	-ly	Beautifully, Carefully, Creatively, Quickly

TOEFL Cheat Sheet: Jika Anda melihat susunan kata berupa Adjective + Noun (contoh: *structural development*) atau Adverb + Adjective (contoh: *highly beautiful*), itu adalah susunan baku yang paling sering diuji!

📝 TOEFL Exam Example (Error Identification)

Pilihlah huruf di bawah kata yang salah secara gramatikal:

The laboratory technician completed (A) the chemical (B) analysis perfectly (C) and provided a description (D) report.

Kunci Jawaban: D (description)
Pembahasan: Perhatikan kata setelah pilihan D, yaitu kata benda report. Sebelum kata benda, kita membutuhkan sebuah Adjective (Kata Sifat) untuk menjelaskannya, bukan Kata Benda lain (*description*). Suffix -tion menandakan noun. Bentuk yang benar seharusnya adalah bentuk adjective-nya, yaitu descriptive (*descriptive report*).

🎯 Interactive Practice Quiz

Uji pemahaman Anda langsung di bawah ini. Klik opsi jawaban yang paling tepat!

Question 1: The government is trying to accelerate the economic ________ of the rural areas.

A. develop (Verb)

B. development (Noun)

C. developing (Participle)

D. developable (Adjective)

Question 2: Identify the INCORRECT word:
The newly appointed director gave a highly(A) impressive(B) speech that deep(C) moved the audience(D).

A. highly

B. impressive

C. deep

D. audience

Question 3: Freezing temperatures can cause ________ damage to certain types of agricultural crops.

A. severe (Adverb)

B. severity (Noun)

C. severe (Adjective)

D. severeness (Noun)

Question 4: Identify the INCORRECT word:
The criticism(A) of the architecture project was entire(B) justified(C) given the safety concerns(D).

A. criticism

B. entire

C. justified

D. concerns

Question 5: Although the historical data was sparse, the team managed to ________ the exact timeline of the ancient civilization.

A. clarify (Verb)

B. clarity (Noun)

C. clear (Adjective)

D. clearly (Adverb)

💡 Usage in TOEFL Context

"The researcher successfully argued that academic success depends heavily on structural support." Peneliti tersebut berhasil mempertahankan argumennya bahwa keberhasilan akademis sangat bergantung pada dukungan struktural.