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.
An interesting aspect of this topic is that the human brain isn't fully mature until at least the mid-20s. It may be even later, as relevant longitudinal studies are going on that keep pushing the age up as the cohort being studied is re-examined. The frontal cortex is the last major brain area to mature.