2. time 表示不可数名词，意为“时间”。（点击学习>>>>>初中英语语法讲解：不可数名词）

表示可数名词，意为“次数，倍数”

What time is it?

I go to the movies three times a week.

注意“次数”的表达方法

一次 once，两次 twice，三次或三次以上用基数词加上 times：

three times, five times, one hundred times

表示“……几次”的表达方法是：

once a day/ a week/ a month/ a year

twice a day/ a week/ a month/ a year

3. exercise v./ n. shop v./ n.

He often exercises on weekends.

We often do / take exercise on weekends.

We often shop on weekends.

There are many shops in the neighborhood.

4. as for 意为“就……而论;至于”

As for fruit，I eat it sometimes.

As for him，I never want to see him here.

至于他，我永远不希望在这里见到。