过去式与过去分词

写出下列词的过去式和过去分词

1\ enter            2\ visit             3\ travel          

4\ be                5\ try               6\ sell

7\ write             8\ give            9\ go

10\ have

1   entered    entered

2    visited    visited

3   traveled    traveled

4   was/were    been

5   tried    tried

6   sold    sold

7   wrote    written

8   gave    given

9   went    gone

10  had    had