托福动词 -ing形式1． 不定式和动词 -ing形式都可以做主语，动词 -ing形式做主语表示一般或抽象的多次行为；不定式做主语往往表示具体的或一次性的动作。如：Playing with fire is dangerous./ To play with fire will be dangerous.（指一具体动作）2． admit, appreciate, avoid, consider等动词后一般用动词 -ing形式做宾语。3． 在allow, advise, forbid, permit等动词后直接跟动词作宾语时，要用动名词形式；如果其后有名词或代词做宾语，然后再跟动词作宾语补足语时，其宾语补足语用带to的不定式。如：We don't allow smoking here. / We don't allow students to smoke.托福
托福across from与from across都可以说，但含义稍有区别：(1) across from 表静态意义，意为“在对面”，此时也可省略from只说across。如：Just across from our house there's a school. 就在我们房子的对面有一所学校。I'm staying at a little hotel just across from the Libyan Embassy.?(2) from across 则表动态意义，意为“从……的对面”。如：He shouted to me from across the room. 他从房间的另一边向我喊。They waved at us from across the room. 他们从房间那一头向我们招手。托福</p 产品：澳博培训供货总量：不限产品价格：议定包装规格：不限物流说明：货运及物流交货说明：按订单
