多长时间了？— for & since

How long have you…?

上一节你用 already / yet 写了新学期准备；这一节抓「多久」——for + 时间段与 since + 起点。

for 与 since 对照

类型	搭配与例句	中文提示
for	for + 一段时间：for two years, for three months, for a week, for several days …	回答「有多久」，后面跟可量的长度。
since	since + 起点：since 2019, since last summer, since Monday, since I was in Grade 7, since I joined the club …	回答「从什么时候起」，后面跟时间点 / 年份 / 从句（since 后可接从句）。

for six years 与 since six years ago 常可换思路表达，但 since + 纯时间段（如 since three years）不地道，应改为 for three years 或 since 2022 / since three years ago。

答句默认隐藏，点「显示答案」后可见。底部「朗读全部问句」只读问句；答句请点各组「朗读答句」。含 since I joined the club（since + 从句）。

每题选一；提交后看得分与解析。

操作：先点击空白槽（出现黄框），再点下方 for / since 标签；也可把标签拖入槽位。点同一槽可清空。

for since for since for since

考点：since + 年份 / 起点与 have lived / have been 等持续义；题干为改编，非真题原文。

borrow / buy 等不能直接与 for two weeks 连用时，要换延续动词说法——详见 L10-09 延续动词转换。

灰色备忘：含 for / since 的中译英综合训练见 L10-10 翻译仿写。

How long 问「多久了」；How soon 问「还要多久才来」——本页不练 How soon，仅防口误。