Matching Pairs topics of englishOnline version resolver by SANTIAGO ESTRADA PICHARDO 1 First Conditional 2 Second Conditional 3 Simple Past 4 Third Conditional 5 Past Perfect Continuous 6 Zero Conditional 7 Present Perfect Continuous 8 Past Perfect 9 Present Perfect If you heat water to 100 degrees Celsius, it boils If I won the lottery, I would travel the world. He has been studying for three hours. If I had known about the party, I would have gone. I visited my grandmother last weekend. They had been waiting for an hour before the bus arrived. They have lived in this city for five years. If it rains tomorrow, we will stay indoors. She had already eaten when I arrived.