aim可以後跟不定式to do或者介詞短語at doing。
例如:
He aims to go to Beijing University.
He aims at going to Beijing University.
aim at 是主動,表打算、準備。。 be aimed at 是被動,表被打算。。。 非謂語做放在句首如果後面的主語與動詞是主動關係,用aiming at.
例:Aiming at improving his grades,his parents sent him to the school.這裏父母作爲主語,是主動狀態,想要送他去學校來提高成績。父母(主語)和打算(謂語動詞)之間是主動關係。 
如果主語和謂語動詞是被動關係,就用be aimed at。
例:The picture,aimed at show off their love, was put in the dining room.這張被用來炫耀他們的甜蜜的照片被擺在了餐廳裏。 主要是看主語與謂語動詞的主被動關係來選擇