sciecon

you are =you'rehe is =he'sshe is=she'sit is =it'sThey are =they'rethey were=they'erwe are=we'rewe were=we'erI would=I'dyou would=you'dHe had=He'dI have=I'veHe has=He'smust not =mustn'tneed not=needn'tshould not=shouldn'twould not =wouldn'tShe will=She'll其实学有很多，你可以在平时的阅读中多积累，另外，如果你仔细观察的话已经发现，以上有几组的缩写形式都是一样的，这必须在特定的语境中去理解。如He's a handsome He's got a new

没有SCI检索，不过他们有的期刊有Web of Science数据库的子库CABI databases这个检索，比如英文期刊American Journal of Plant Sciences，也有知网学术的检索。经管类有的期刊有比较好的检索，比如EconLit，ERA 2018 Journal List这些，都是比较好的检索，也都有知网学术的检索。如果SCI不是必须，我觉得可以试试。