Questions and Answers About English Grammar. A strong verb is one in which tense is expressed by an internal vowel change, and a weak verb is one in which tense is expressed by a regular affix ( Linguistics for Everyone: An Introduction, 2013).
Jensen says scientists used to think human brain development was pretty complete by age 10. Or as she puts it, that a teenage brain is just an adult brain with fewer miles on it.. But it's not. To begin with, she says, a crucial part of the brain â the frontal lobes â are not fully connected. Really.
Much of your body is already fully developed even before you reach adulthood. According to Medline Plus, men's genitals are fully developed by 16 to 17 years old. Although you might reach maturity in many areas before adulthood, there are still changes and declines that take place, especially between 35 to 60 years old during middle adulthood.