Kalimat complex sentence adalah tipe kalimat yang terdiri dari satu independent clause dan satu atau lebih dependent clause. Independent clause merupakan kelompok kata yang mengandung subject, verb, dan biasanya komponen lain hingga membentuk suatu pikiran yang utuh. Dependent clause juga mengandung subject dan verb namun belum mengungkapkan suatu pikiran yang utuh.

Berikut ini beberapa contoh kalimat complex sentence:

Because she had free time during last holiday, she rearranged her house. (Karena dia punya waktu luang selama liburan lalu, dia menata ulang rumahnya.)

• because she had free time during last holiday = adverbial clause
• she rearranged her house = independent clause

I’ll give you a call when I finish. (Saya akan meneleponmu setelah saya selesai.)

• when I finish = adverbial clause
• I’ll give you a call = independent clause

I like the book that he just read. (Saya suka buku yang baru dia baca.)

• that he just read = adjective clause (essential)
• I like the book = independent clause

Tom, which is very cute, is my cat. (Tom, yang sangat manis, adalah kucing saya.)

• which is very cute = adjective clause (non-essential)
• Tom is my cat = independent clause

People who do exercise regularly have lower risk of depression. (Orang-orang yang berolahraga secara teratur memiliki resiko depresi yang lebih rendah.)

• who do exercise regularly = adjective clause (essential)
• People have lower risk of depression = independent clause

Yulia, who does a lot of exercise, has a positive body image. (Yulia, yang banyak berolahraga, mempunyai body image yang positif.)

• who does a lot of exercise = adjective clause (non-essential)
• Yulia has a positive body image = independent clause

I forgot where I put my key. (Saya lupa di mana saya meletakkkan kunci saya.)

• where I put my key = noun clause
• noun clause menjadi direct object bagi verb “forget” pada independent clause

That today is my birthday is not right. (Bahwa hari ini ulang tahun saya tidak benar.)

• that today is my birthday = noun clause
• noun clause menjadi subject bagi independent clause