I'm going to do the roll call now.

下面开始点名。

Did the teacher do the roll call yet?

老师点过名了吗？

I'm taking attendance.

我正在点名。

Say 'here' when I call your name.

我点到大家名字的时候请答“到”。

Raise your hand when I call your name.

我点到大家名字的时候请举手。

Why are you late?

你为什么迟到？

Don't be late./Don't come to class late.

不要再迟到了/上课不要再迟到了

Try to be in class on time.

尽量按时来上课。

You've been absent for three days straight. Where have you been?

你已经连续三天旷课了，你到底去哪儿了？

Let's get started./Let's get going.

我们开始吧/让我们开始

Let's start with a little review from last time.

首先让我们复习一下上次学习的内容。

Who knows the answer to the first question?

谁知道第一个问题的答案？

Who wants to go first?

谁想第一个来？

We'll finish this section today and start the next one tomorrow.

今天我们将学完这一部分，明天开始学习下一部分。

I need you to get into groups of three or four.

我需要大家分成三到四人的小组。

You can work on the assignment alone or with a partner.

你可以自己完成这个任务，也可以找一个搭档一起完成。

We'll have a review day at the end of the week.

本周末我们将进行复习。

Dialogue:

A: I checked class started at eleven. Why are you late?

据我所知，我们是11点开始上课，你为什么迟到？

B: I'm sorry, Mr Smith. I couldn't find my history book.

对不起，史密斯老师。我找不到我的历史书了。