The naught boy pretended -------- (read) when he saw his mot

to be reading
pretend to be doing sth 假装在做某事
语言点：
pretend 是及物动词, 意为“假装”
后面可以接宾语从句,动词不定式, 但不能接动名词作宾语.

The naught boy pretended to be reading.
那个调皮的男孩假装在看书

等于：
The naught boy pretended that he was reading.

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