lose heart 丧失勇气 worry about 担心（动作）
lose one’s heart to sb/sth 爱上，喜欢上 be worried about 担心（状态）
in trouble 处于不幸中 be sentenced to 被判处
be out of work = lose one’s job 失业 be equal to 相等的，平等的
as a matter of fact = in fact = actually 事实上 beg for 乞讨
blow up 充气，爆炸 set up 建立，创立；设置，竖起
send up 发射，使上涨 set about 着手做某事 (set about doing sth)
go up 上升，增长；被兴建 set off 出发，动身
set up 设立，建立；设置，竖起 set out 陈列，摆出；开始（set out to do sth）
be active in = take an active part in 积极参与，在……活跃
keep sb from doing sth阻止某人做某事 die for 为……而死
stop sb (from) doing sth die from 死于（外因）
prevent sb (from) doing sth die of 死于（内因 如：饥饿，寒冷，疾病等）
put sb in prison= throw sb into prison= send sb to prison 把……投入监狱
advise sb to do sth 建议某人做某事 advice 不可数 a piece of advice
advise doing sth fight for 为争取……而斗争
advise sb on sth fight against 为反对……而斗争
advise that (should)+ v原 fight with 同……并肩作战/ 同……斗争
have problems/ difficulty/ trouble with sth work out 算出
have problems/ difficulty/ trouble (in) doing sth have a go= have a try
be willing to do sth 乐于做某事 realize one’s dream of 实现…… 的梦想
answer violence with violence 以暴制暴 break the law 违反法律
come to power 当权，上台 social activities 社会活动
equal (adj)------equally (adv)------equality (n) violence (n)------violent (adj)
cruelty (n)------cruel (adj)------cruelly (adv) educated (adj)------education (n)
willing----unwilling 不愿意的 active----inactive 不活跃的
1. Only then did we decide to answer violence with violence.
only 放在句首且后接状语时（作状语：副词；介词短语；状语从句），要使用部分倒装------才用一般疑问句语序。
Only yesterday did his father tell him the truth.
Only when his father came back did he go to bed. （从句无需倒装，主句要倒装）
2. He strongly believed in the three principles: nationalism; people’s rights; people’s livelihood.
他主张三民主义：民主、民权、民生。
3. I felt bad the first time I talked to the group.
the first time 用法相当于连词用法，用来引导从句
链接：It’s the first time that 现在完成时
It was the first time that 过去完成时
4. He taught us during the lunch breaks and the evenings when we should have been asleep.
should have done 本应做而未做
needn’t have done 本不应做而做了
can’t have done 过去不可能做过