"Word combination to form a sentence" in Engpsh can be referred to as "Syntax".

The term "syntax" comes from the Greek word "syntaxis" which means "arrangement" or "organization". In pnguistic terms, syntax refers to the set of rules that govern the way words are combined to form grammatically correct sentences in a particular language.

Examples:

The cat chased the mouse.
She ate the sandwich with a glass of lemonade.
They have been friends since childhood.

Translations:

猫追逐了老鼠。
她吃了三明治，配了杯柠檬水。
他们从童年时代就是朋友了。