BKimball
Raths,
Although the dash is pretty rare on the GMAT, it certainly does show up and is therefore worth discussing. Most often, the dash can take the place of a comma under a few specific scenarios:
1. The dash can serve to see off a list:
"I went to the mall with my friends -- Jim, Joe, and Jerry -- and bought a new pair of pants." Here, my friends names are "Jim, Joe, and Jerry." Often, people use commas here. The issue with commas is that it would be slightly ambiguous:
"I went to the mall with my friends, Jim, Joe, and Jerry, and bought a new pair of pants." Here, it's not clear whether Jim, Joe, and Jerry ARE the friends or if they went to the mall WITH me and my friends.
2. The dash can serve to set off a parenthetical:
"My high school football team -- who hasn't won a game in 40 years -- just beat the best school in the state." Here, the dash serves the same purposes as parentheses. You really don't use parentheses on formal occasions such as GMAT test day.
Hope that helps!
Brett
Hi Brett,
Please help me understand the hyphen here
Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"—at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
(B) that at some time in the past our ancestors suffered an event that greatly reduced their numbers
This is correct answer choice but i really didnt understand
Thanks for ur help
Cheers