If the boy.(be) ready for the lesson, he (get) a good mark.
If

Каждое из этих предложений можно перевести как в 1, так и во втором типе. Так как конкретного условия нет,  переведу в обоих.  
I Conditional 
If the boy is ready for the lesson, he will get a good mark.
If they worry about the test, they will come on time.
If he.needs money, he will  ask for a job.
If we try our chance, we will spend the weekend in the country.
II Conditional 
If the boy was ready for the lesson, he would get a good mark.
If they worried about the test, they would  come on time.
If he.needed  money, he would   ask for a job.
If we ttried our chance, we would  spend the weekend in the country.