2)If I (to do) this test,I (to improve) my English.3)If I (to find) your ring,I (to give) it back to you.

2.If I do this test, I shall* improve my English.
3.If I find your ring, I shall* give it back to you.

If I do this test, I will improve my English

If I find your ring, I will give it back to you

Объяснение: