希望以下的FAQ对你有帮助，主要是最后一个：
Suppose you have a flying mount: a griffon. What do
you have to do to use the ride-by tactic in the air or in
swooping down on a target? Do you need to take the Flyby
Attack feat? Or does the Ride-By Attack feat cover flying
mounts as well? For the mount to make a single attack
when riding or flying by, does it also need to somehow gain
a feat? If so, which one?
If the example rider wants to make attacks while flying by
foes, she needs the Ride-By Attack feat and needs to charge
(and fly) in a straight line (see the next question). For the
mount to attack in the same situation, it would need the Flyby
Attack feat. The rider’s Ride-By Attack feat won’t help the
mount attack, and the mount’s Flyby Attack feat does not help
the rider attack.
Note that you have to have a fly speed to take the Flyby
Attack feat. If you merely ride a flying mount, you don’t meet
the prerequisite for the feat. If you can meet the prerequisite,
your flying mount still doesn’t benefit from your Flyby Attack
feat (although it’s possible that a feat or class feature might
allow you to share the feat).
With the rules erratum that prohibits overruns as part
of a charge, the Ride-By Attack feat is now nearly useless.
You must use the charge action to use the Ride-By Attack
feat, and that requires you to travel in a straight line
toward your target. Using the example in the Player’s
Handbook, this would appear to rather specifically mean
along a line from your entire square (or squares if riding a
horse or other mount with a space of 10 feet or greater), to
the target square. Ride-By Attack allows you to continue
moving along the straight line of the charge after your
attack. This would have to mean that at some point you
would enter the square (or squares) of the creature you
attacked. (At least I cannot conceive of any other way it
could be done). Since you cannot enter your foe’s space
unless the creature is already dead, Ride-By Attack is now
pretty much useless if you can’t also overrun the foe. Some
have suggested that you could charge in a manner that
would not bring you through the target creature’s square
(or squares). To do so, you would not be charging directly
toward the target and likely not moving by the shortest
route (also a charge requirement) or attacking it from the
first possible square (another charge requirement). In any
of these cases, you would be breaking the rules for a charge.
Am I wrong about any of this?
No, you’ve got it about right.
When using the Ride-By attack feat, you must conduct your
charge so that you move in a straight line toward the closest
square from which it is possible to attack your chosen foe, so
long as it is a square that allows you to attack and then continue
on in the straight line of the charge. You still must attack your
foe the moment you reach that square. (Although the feat
description doesn’t say so, you and your mount also must move
at least 5 feet after you make your attack to get the benefit of
the feat.) This is a special rule for charging when using the
Ride-By Attack feat. Note that the Flyby Attack feat (discussed
in the previous question) does not require you to move in a
straight line. You merely make a single move and take another
standard action at some point during that move.
Q：假设你有个飞行坐骑：狮鹫。若你在空中使用快速骑乘攻击（ride-by）战术，或者向某个目标猛扑时有哪些条件是必须的？你是否需要选取快速飞行攻击（Fly-by Attack）专长？抑或快速骑乘攻击专长也包括空中坐骑的情况？在骑乘或者快速飞行攻击的过程中，要让坐骑也作出一次攻击，是否需要选取某个专长呢？如果是的话，要选取哪一个？
A：如果例中的骑手想要在飞过敌人的时候做出攻击，她需要快速骑乘攻击专长，而且要在一条直线上冲锋（和飞行）,(参看下一个问题)。同样情况下，坐骑要想做出攻击，它需要快速飞行攻击专长。骑手的快速骑乘攻击专长对坐骑的攻击并无助益，而坐骑的快速飞行攻击专长对骑手也一样。
Q：规则勘误上禁止将闯越作为冲锋的一部分，快速骑乘攻击（Ride-By Attack）专长现在近乎无用了。你只有使用冲锋动作时才能用快速骑乘攻击专长，而这需要你向目标直线移动。参看PHB上的例子，何谓从你的整个格子（如果你骑乘马或者其它坐骑则是10尺见方甚至更大的区域）到你目标的直线，这里给出了相当清楚的解释。快速骑乘攻击允许你在攻击后，沿着冲锋路线继续移动。这意味着在某个点上你将会踏进对方所处的格子（也许是多个格子）。（至少我没想出来会有其它情况）。既然除非对手死掉，否则你不能进入它的格子，那么如果你不能闯越该敌人，快速骑乘攻击就几乎完全无用了。有人建议说，你的冲锋可以不穿越目标生物的格子。但这么做你不是径直地冲向目标，而且多半走的不是你们之间的最短路线（这也是冲锋的前提条件），要么可能不是在头一个能攻击到对方的位置发动攻击（另一个冲锋的前提条件）。不管怎样，你都会违背冲锋的规则。我的这些认识有错吗？
A：没错，你基本上是对的。当使用快速骑乘攻击专长的时候，你必须沿着直线向距你最近的能攻击到你选定目标的那个格子作冲锋，只要这个格子的位置允许你攻击之后继续沿这条冲锋直线移动 .当你到达这个格子时你必须攻击你的敌人（虽然专长描述上并没有明确说，但你和你的坐骑在你攻击后仍须至少移动5尺才能获得该专长的好处）。这是使用快速骑乘攻击专长来冲锋的一条特别规则。要注意快速飞行攻击（Fly-By Attack）专长（在前面问题中讨论了）不要求你必须直线移动。你只需做一个移动，并在此移动中的某个位置上做一个标准动作就可以。
