按要求改写成相对应的时态。
1）I buy a can of cola.
①____________________________________________(一般过去时)
②____________________________________________(现在进行时)
③____________________________________________(一般将来时)
④____________________________________________(过去进行时)
2）She washed face yesterday.
①____________________________________________(一般现在时)
②____________________________________________(现在进行时)
③____________________________________________(一般将来时)
④____________________________________________(过去进行时)
3）They are visiting their relatives.
①____________________________________________(一般现在时)
②____________________________________________(现在过去时)
③____________________________________________(一般将来时)
④____________________________________________(过去进行时)
4）Tom and Ben are going to go to Beijing.
①____________________________________________(一般现在时)
②____________________________________________(一般过去时)
③____________________________________________(现在进行时)
④____________________________________________(过去进行时)