英语高手，大哥大姐来帮小弟一把！

Question

Did you teach English ( )a long ago?
a. for b. since
no，I have taught English since 5 years ago .
练习册的题是不是有问题？提问时间段不是用现在完成时嘛？？
一般过去时还能用时间段做时间状语啊？？！！！速度
大哥大姐帮帮忙！！！！！！！！！！！！！！！！1
一般过去时还能用时间段 for a long time？？？、、好像是时间点把？？？ 帮帮忙！！！！高手！！高手！！！！！！！

Answer 1

现在完成时可以和带有since或for等表示“一段时间”的状语连用,表示动作或状态从某一时刻开始，一直持续到现在。如：I haven't seen him for two years. 但是，像come,arrive,buy等终止性动词不能与表示“一段时间”的状语连用。要用，必须改为“be（在）”等延续性动词来表述。现归纳总结一下由非延续性动词到延续性动词的转换：
arrive→be here begin(start)→be on
die →be dead
fall ill(sick,asleep)→be ill(sick,asleep)
get up→be up go out →be out
finish →be over put on →wear 或be on
open →be open join →be in或 be a member of…
close →be closed go to school→be a student
borrow →keep buy →have
catch(a cold)→ have(a cold) get to know →know
begin to study→study come to work→work等

Answer 2

Did you teach English since a long time ago?
你漏打了time是吗

Answer 3

你教英语很久了吗?
-没有多久, 教了五年.
选a 吧