1. … in the beginning 最初，开始时
Cf: in the beginning 和at the beginning of … 的区别。at the beginning of … 在……的开头

There are a few pictures of the author at the beginning of the book.
书的开头有几幅作者的照片。
They aren't on good terms, because they didn't like each other in the beginning.
他们的关系不很融洽，因为他们一开始就不合。

2. be sure that … 务必

Be sure that you water all the flowers before you leave.
你离开前务必给花浇水。

be sure to do…

Be sure to take an umbrella with you.
一定要随身带把伞。

Be sure not to do…

Be sure not to be late again.

3. at a time 一次
Cf: 注意 at a time 和 at one time 区别。at a time 一次； at one time 一度；从前

Students can borrow two books from the library at a time.
学生一次只能借两本书。
At one time he used to visit his best friend every week.

4. connect … with … 把……与……联系在一起

Poverty is always connected with ignorance.
贫穷总是和愚昧（无知）联系在一起的。

5. divide … into … 把……分成（若干部分）

Our English teacher likes to divide our class into small groups.
我们的英语教师喜欢把我们分成小组。
Textbooks are usually divided into chapters.
教科书通常被分成章节。

6. make a picture in your mind: 想象，相当于 imagine

Make a picture of what you want to be in your mind and you will be drawn towards it.
把你想象成什么样，你就会成什么样。
Make a picture of your winning and that alone will lead to your success.
如果把自己想象成赢的，只这一点就足以让你成功。