...t important to study the situationin Russia. 有没有在it后面少一个is（was?)?或者说这里可不可以加一个is(was?)，二者有什么区别？还有类似的： We think it important to obey the laws. it 后面没有少一个is吗？
When I had asked him what first gave him the idea of being a painter, he was unable or unwilling to tell me. I could make nothing of it. I tried to persuade myself than an obscure feeling of revolt had been gradually coming to a head in his slow mind, but to challenge this was the undoubted fact th...
...dʒiˈɑlədʒi/ n., pl. -gies.the science that deals with the physical history of the earth, the rocks of which it is made up, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.我尝试着（大概齐）翻译这段话：这门科学是有关研...
...Gort’s left, behind a stout, inspired defence by Roden’s Cavalry Corps on the
Gette River, the Belgian infantry withdrew in good order to the ‘K-W Line’,
manning a 31-mile (50km) front with eight divisions, backed up by three more,
with another two on the Willebroek Canal and a reserve of ca...
She should be here by now.=She should have arrived here by now.好像从没看到过She should have been here by nowshould have been here是过去应该在这但现在不在的意思吗那么也应该说She should know the news by nowShe knew the news before she read the newspaper She shou...
...ort & export company, but he---- for thisindustrial fair, since he ison leave.为什么现在进行时is working可以，而现在完成时has been working不对？由于怀特先生在休假，所以最近都在这个工业展览会帮忙，怎么不对？这个又不是只开一天。。。
...语用法问答1144例》P528关于动名词有这样一道题：His being not able to come 并不错。有读者问一道选择题：He apologized for _______.A.his being not able to come B.his being able not to come.读者觉得A,B 都不对，应该是hisnot be...
...162.play at（P1953）（1）作“if you play at doing something, you do not do
it properly or seriously不认真地干，对……敷衍了事”解时，构成“play at
doing something”。例如：He’s still playing at
being an artist. 他对于当艺术家仍然三心二意。（2）作“B...
...ys wanted to keep growing as a writer，not run in place.In Academic Writing，you must always keep to the topic. Never get off the topic.在用逗号或者句号后都可以有谓语吗？还是不...
They have an air of freedom, and they have not a dreary commitment to mean ambitions or love of comfort.（新概念四Lesson5）请问老师，这里不用don't have而是用not a，是not a=no吗，然后后面的or表示否定成分的并列？