1. If Paul reads the book, he will learn a lot of new things. (First Conditional: Present Simple в условии, Future Simple в результате)
2. If Peter gets a good mark tomorrow, her mom will be happy. (First Conditional: Present Simple в условии, Future Simple в результате. 'gets' с 'he')
3. If he helps us tomorrow, we would finish the task. (Third Conditional: Past Simple в условии, 'would' + инфинитив в результате. 'helps' с 'he')
4. Mike rode a bike yesterday, if the weather was fine. (Second Conditional: Past Simple в условии, 'would' + инфинитив в результате. Здесь условие 'if the weather was fine' относится к прошлому)