( 1 ) Will you come again____________ next week?

( 2 ) I'll stay here for_____________.

( 3 ) My house is _______________bigger than hers.

( 4 ) I ______________have letters from him.

[一语击破]

sometime 是副词，意为“在某人不确定的时间”，“在某个时候”，“有朝一日”，可以与将来时连用，也可以和过去时连用。如：

She was there sometime last year.

some time 是名词词组，意为“一段时间”，做时间状语用，谓语动词用延续性动词。如：

They'll stay here for some time.

some times 意为“几次，几倍”，表示次数或倍数。如：

We have been there some times.

sometimes 意为“有时”，表示频度，可以指过去、现在或将来的时间概念。如：

I go to the cinema sometimes.

Keys： ( 1 ) sometime ( 2 ) some time ( 3 ) some times ( 4 ) sometimes