1. We received this letter from Continental Equipment a week ago.
2. When we receive your confirmation, we will open the letter of credit.
3. I want to test this equipment.
received - Past Simple Active (простое активный залог), инфинитив - to recieve;
receive - Present Simple Active (простое настоящее, активный залог), инфинитив - to recieve;
will open - Future Simple Active (простое будущее, активный залог), инфинитив - to open;
to test - Simple Infinitive Active (простой инфинитив в активном залоге).
The temperature is five degrees of frost, isn"t it?
What is five degrees of frost?
Is the temperature five or ten degrees of frost?
How many degrees of frost is the temperature?