考研英语的复习，词汇量积累是非常关键的，是英语提分的基础，尤其是历年真题中常出现的词组。海天考研小编整理了常出现的词组，一起来学习吧。

401. instead of (=in place of) 代替，而不是…

402. instruct…in (=teach) 教.指导.训练某人…

403. insure…for 把…保险(多少钱);ensure 使安全; assure…(of) 使…确信,保证

404. insure…against 保险…以防

405. intend…for 打算把…给

406. (be) intent on 专心致志, 坚决

407. in the interests of 符合…的利益; be interested in 对…感兴趣

408. interfere in干涉, interfere with打搅,干扰

409. at intervals 每隔一会儿, 每隔一段距离

410. intervene in 干预

411. invest in 投资

412. be involved in (=become connected or concerned) 卷入, 参加

413. by itself (=alone, without help)单独地,靠自己

414. in itself 本身; of itself 自发,自然

415. be jealous of 妒忌

416. jump at (=to be eager to accept)抢着接受

417. jump on (=scold, tell of) 叱责

418. junior to sb. 年纪较…轻, 职位较…低.

419. (be) keen on 喜爱, 渴望

420. keep a close watch on ( =keep a sharp lookout for) 密切注视

421. keep…to oneself(=keep secret)不告诉别人

422. to(the best of) one’s knowledge 据…所知

423. at large(=at liberty, free) 在逃, 逍遥法外;at large(=in general) 一般来说, 大体上;at large(=at full length; with details)详细地

424. lean against (背)靠着…

425. at least 至少; at most 至多

426. (not) in the least 一点(也不), 丝毫(也不)

427. at one’s leisure 在…有空的时候

428. lend itself/themselves to适合于(某用途)

429. at length (=after a long time, at last)终于;at length (=in detail, thoroughly)详细地

430. go to any length想一切办法, 尽一切力量

431. be liable to (=be subject to)易于..的,应受(罚)

432. be liable for 对…应负责任的

433. lie in 在于

434. in life 一生中

435. for life 终身

436. in the light of (=considering; taking into account) 考虑到, 根据

437. throw light on ( = make clear, explain) 使…更为清楚, 提供线索, 阐明

438. in line with(=in agreement with)符合,一致

439. long for(=want very much)渴望,希望得到

440. for long 很久,很长时间(否定句.疑问句中)

441. before long (=soon)不久, 过了不久以后.

442. in the long run (=in the end)从长远来说,最后; in the short term (从短期来说)

443. (be) at a loss 不知所措

444.major in 主修(某课程)

445. as a matter of fact 实际上, 事实是

446. by all means (=at all costs)不惜一切; (=certainly) 当然行;by means of用…; by no means 完全不, 决不

447. on memory of 为纪念…

448. on the mend (=in the process of recovering) 好转, 在康复中

449. mention sth. to sb. 向某人提起某事

450. at the mercy of (=in the power of) 任…摆布, 在…支配下