行。二. usually的频度为70%左右，译为“通常”、“平常”，即很少例外。例如：
Where do you usually spend the summer holiday?
你通常在什么地方过暑假？
He usually goes to bed at ten o”clock.
他平常10点钟睡觉。
It”s more than usually crowded today.
今天比平时拥挤。
三. often的频度为50%左右，意为“常常”，不如usually那么频繁，表示动作重复，中间有间断。例如：
Mary often weeps when she is alone.
玛丽一个人经常哭泣。
He is often late for school.
他上学经常迟到。
▲Very often语气比often重，常位于句首或句末。例如：
Very often you cannot know one without knowing the other.
如果不知其一，往往不知其二。
He doesn”t go to london very often.
他不常去伦敦。
行
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