1704923190
in this century
1704923191
1704923192
in spring
1704923193
1704923194
in this decade
1704923195
1704923196
in the past few years
1704923197
1704923198
in the daytime
1704923199
1704923200
在表示“……之后”时，也可用in：
1704923201
1704923202
in an hour
1704923203
1704923204
in a day or two
1704923205
1704923206
in twenty minutes
1704923207
1704923208
in sixty days
1704923209
1704923210
in time
1704923211
1704923212
in no time
1704923213
1704923214
in a fortnight
1704923215
1704923216
in a few years
1704923217
1704923218
在表示某一天时多用on：
1704923219
1704923220
on Monday
1704923221
1704923222
on the 23rd
1704923223
1704923224
on Christmas Day
1704923225
1704923226
on New Year’s Day
1704923227
1704923228
morning等词若有定语修饰时，前面也需用on：
1704923229
1704923230
on Tuesday morning
1704923231
1704923232
on Friday evening
1704923233
1704923234
on an autumn night
1704923235
1704923236
on New Year’s Eve
1704923237
1704923238
在有this, last, one等词修饰时，这些名词前一般不再加介词，如：
1704923239
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