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확장 문법

If+현재동사, if+과거동사. (if:만일 ~ 라면) : 가정법

The question is easy.

he skips it.

=> if the question is easy, he skips it.

if the boy understand her explanation, the boy will solve the question easily.

if the boy knew all the answers, he would  not ask for her helpn.

 

문장모음

A boy is studying. The boy has some questions. She is helping the boy.

Some problems were difficult to understand.

She explanation and teaches for the questions.

She gives a hint to the boy.

If the question is easy for him, he skips it.

If the boy understands her explanation, he will solve the question easily.

If the boy knew all the answer, he would not ask for her help.

접속사

While a boy is studying, she is helping the boy.

If the boy knew all the answer, he would not ask for her help.

However, some problems were difficult to understand so the boy has some questions.

She explains and teaches for the questions as she gives a hint to the boy.

If the question is easy for him, he skips it.

If the boy understands her explanation, he will solve the question easily.