| 词组 | ascertain |
| 释义 | 1． 与 find out 相比，ascertain 比较正式，find out 比较口语化。 2． 后面常跟 what， who， when， where，whether，how 等词引导的从句: I need to ascertain who will come to the dinner. We need to ascertain when the meeting will be held. 3． 后面可跟 that 引导的从句: The lawyer ascertained that a po- liceman had dealt roughly with the black man. 4． 后面可以直接跟名词: I need to ascertain the facts. 5． 常与介词 by，from，as 连用: the laws ascertained by scientists facts ascertained from the univer- sity files objects ascertained as being sat- ellites as follows 在现代英语中，已作为固定词组，不随人称或时态变化，常用 to be as fol- lows 的句型，作“如下”解: Our main products are as follows: fresh garlic， fresh ginger， fresh carrot and fresh taros. |
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