特殊词精讲： be afraid doing/to do（精选2篇）
篇1：特殊词精讲： be afraid doing/to do
感官动词 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do 表示动作的完整性，真实性;+doing 表示动作的连续性，进行性
i saw him work in the garden yesterday.
昨天我看见他在花园里干活了。(强调“我看见了”这个事实)
i saw him working in the garden yesterday.(强调“我见他正干活”这个动作)
昨天我见他正在花园里干活。
典型例题
1)they knew her very well. they had seen her ___ up from childhood.
a. grow b. grew c. was growing d. to grow
答案：a。因题意为，他们看着她长大，因此强调的是成长的过程，而非正在长的动作，因此用see sb do sth 的句型。
2)the missing boy was last seen ___ near the river.
a. playing b. to be playing c. play d. to play
答案a. 本题强调其动作，正在河边玩，应此用see sb. doing sth句型。
篇2：特殊词精讲： be afraid doing/to do
be afraid of doing 担心出现doing的状况、结果。 doing 是客观上造成的，意为“生怕，恐怕”。
she was afraid to step further in grass because she was afraid of being bitten by a snake.
她生怕被蛇咬着，而不敢在草丛中再走一步。
she was afraid to wake her husband.
她不敢去叫醒她丈夫。
she was afraid of waking her husband.