在不同的场合下英语occasion答:situation是情况,情形,境遇,一般与in搭配“in ...situation”case是事情,案例,场合,也与in搭配,如“in that case”“in any case”circumstance是条件,环境,境况,与under搭配,如题 occasion是场合,时机,机会,与on搭配,“on a/an ...occasion”
常用in、on、at作介词开头的词组答:期间), in December, in due course(及时地), in future, in good season(及时地), in no time(马上), in one’s childhood, in one’s spare time, in one’s teens, in one’s youth, in recent years, in season(适时), in seconds(在很短的时间), in some cases(有时候), in...