Grandma fell asleep when watching TV. 奶奶看电视时睡着了。

sleep可作动词，意为 "睡觉"，也可作名词，意为"睡眠；睡觉"。

4. at first "起初，首先"，作为介词短语，只起副词作用（在句中用作状语）。 at first主要用于强调前后对照，暗示接下去的动作与前面的动作不同甚至相反，因此常有 but, afterwards, soon, at last 等相呼应。 e.g. At first we used hand tools. 首先我们使用手工工具。

重点句子点拨：

点拨2： heavily adv. 在很大程度上；大量地

e.g. moving heavily 吃力地移动

It was raining heavily. 雨下得很大。

2. So, when the rainstorm suddenly came .

点拨：suddenly adv. 突然；忽然

e.g. I suddenly remembered that I hadn't locked the door.

我忽然想起没有锁门。

3. That's strange. 那是奇怪的。点拨：strange adj. 奇特的，奇怪的； 不可思议的 e.g. a strange noise 奇怪的声音 He's always here; it's strange you've never met him. 他经常在这，你却没有见过他，真是 不可思议。

4. I called at seven and you didn't pick up. 我七点给你打电话，你没有接。

点拨：pick up(=pick up the phone) 接电话 pick up 还有以下含义： 1) 拾起；抱起 e.g. The children picked up many sea shells at the seashore. 孩子们在海边捡到许多贝壳。 Pick that book up. 把那本书捡起来。

2) 搭载 e.g. The car stopped to pick me up. 汽车停下来接我。 We'll send the ambulance to pick him up. 我们要派一辆救护车把他接走。