YOU SAID:
a boulder crushed my house
INTO JAPANESE
岩が私の家を押しつぶした
BACK INTO ENGLISH
a rock crushed my house
INTO JAPANESE
石が私の家を押しつぶした
BACK INTO ENGLISH
stones crushed my house
INTO JAPANESE
石が私の家を押しつぶした
BACK INTO ENGLISH
stones crushed my house
That didn't even make that much sense in English.