In the “Birthday Box” we learn this lesson, always be thankful for what you have because one day it could disappear. In this story Kate’s mom was very sick for a long time, she was in the hospital for quite a while. On Katie’s tenth birthday she goes to see her mom at the hospital. Katie had a big party with all the nurses and doctors. Kate received a box from her mother and she was too upset that all she got was a box to realize that her mom was using up her last heartbeats. After this event Katie was depressed for about a year, she really missed her.
Salamanders can regrow entire limbs and regenerate parts of major organs, an ability that relies on their immune systems, research now shows. ... They then wiped out some or all of the macrophage cells to determine whether these cells were essential for regrowing the limbs.
It is Subjunctive. Conditionals use "If"
