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.
It may seem logical that those aged 18 to 25 are completely mature, the brain still is maturing â specifically the area known as the âprefrontal cortex.â Changes occurring between ages 18 and 25 are essentially a continued process of brain development that started during puberty.