aim at 是主動(dòng),表打算、準(zhǔn)備.
be aimed at 是被動(dòng),表被打算.
非謂語(yǔ)做放在句首如果后面的主語(yǔ)與動(dòng)詞是主動(dòng)關(guān)系,用aiming at.例：Aiming at improving his grades,his parents sent him to the school.這里父母作為主語(yǔ),是主動(dòng)狀態(tài),想要送他去學(xué)校來提高成績(jī).父母（主語(yǔ)）和打算（謂語(yǔ)動(dòng)詞）之間是主動(dòng)關(guān)系.
如果主語(yǔ)和謂語(yǔ)動(dòng)詞是被動(dòng)關(guān)系,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里.
主要是看主語(yǔ)與謂語(yǔ)動(dòng)詞的主被動(dòng)關(guān)系來選擇