11.27 时态一致$ s/ y" O, g/ s
1) 如果从句所叙述的为真理或不变的事实,则永远用现在时。# J9 d( z8 e, |8 d0 c, q8 C
At that time, people did not know that the earth moves.$ |" y& {; ~# X# L2 y
He told me last week that he is eighteen.: G- _# K' F: x3 K8 \5 V0 T5 d, E
2) 宾语从句中的助动词ought, need, must, dare 时态是不变的。! V( w# q* |: P3 J1 T9 F* q
He thought that I need not tell you the truth.
* {1 w0 h5 y- v% e 11.28 时态与时间状语/ ]5 |$ {7 Y1 C# M
时间状语
4 }! s" z6 y" a+ K/ f 一般现在时 every …, sometimes, at …, on Sunday,6 R. S+ k# |! {& N
一般过去时 yesterday, last week, an hour ago, the other day, in 1982, just now. J+ m4 @# i; q, h- ]2 g/ K
一般将来时 next…, tomorrow, in+时间,( K, C) W0 v' ]
现在完成时 for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently. T; A) S8 _+ [, }; e
过去完成时 before, by, until, when, after, once, as soon as. L5 {3 p4 T. {: w8 L
过去进行时 this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while
$ L5 J, C0 |0 O7 ]' q% { 将来进行时 soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening |