請(qǐng)問(wèn)英語(yǔ)定語(yǔ)什么時(shí)候用詞組,什么時(shí)候用分詞短語(yǔ)?
比如這兩句：
1：不用分詞
The kinds of decisions they can make are.
"they can make"是"decisions"的定語(yǔ)
2：用過(guò)去分詞
They can solve problems for people by carrying out instructions given to them.
“given to them”是“instructions” 的定語(yǔ)
3：用ing分詞
A sequence of instructions describing how to perform a certain task is called program.
“describing how to perform a certain task”是“instructions”的定語(yǔ)
為什么呢?什么情況下作定語(yǔ)不用分詞,像1句那樣.什么情況下用分詞,像2,3句那樣.
希望得到詳解