guard做動詞有看守;守衛(wèi);保衛(wèi);提防等意思，那么你知道guard的過去式是什么嗎?接下來跟著學習啦小編來學習一下吧。

　　guard的過去式和其他時態(tài)：

　　過去式: guarded

　　過去分詞: guarded

　　現(xiàn)在分詞: guarding

　　guard的用法：

　　guard的用法1：guard的基本意思是為防御而進行警戒,可指“保護”“守衛(wèi)”以防外敵侵入,也可指“看守”“控制”以防內(nèi)部人外逃。引申可指“防范”“嚴守機密”“警惕”“預防”等。

　　guard的用法2：guard多用作及物動詞,賓語通常是人,賓語后常接介詞from表示“保護某人或某物不受…”; 偶爾也可用作不及物動詞,與against連用表示“避免”“預防”。

　　guard的用法3：guard的過去分詞guarded常用作形容詞,在句中可作表語,意為“審慎的”“嚴守的”。

　　guard的過去式例句：

　　1. He is being guarded by a platoon of police.

　　有一隊警察看守著他。

　　2. Environmental groups have given a guarded welcome to the Prime Minister's proposal.

　　環(huán)保組織對首相的提議表示謹慎的歡迎.

　　3. In the office, Dr. Lahey seemed less guarded, more relaxed.

　　萊希博士在辦公室里看起來沒有那么謹小慎微，放松了許多。

　　4. The camp is surrounded by razor-wire fences and guarded by military police.

　　營地周圍架著尖利的鐵絲網(wǎng)，且有憲兵看守。

　　5. Details of its past activities were zealously guarded.

　　它以往活動的詳細情況被嚴格保密。

　　6. The formula is jealously guarded.

　　配方被小心翼翼地收藏著。

　　7. He closely guarded her identity.

　　他對她的身份守口如瓶。

　　8. The boy gave him a guarded look.

　　那個男孩充滿戒心地瞧了他一眼。

　　9. You should be more guarded in what you say to reporters.

　　你對記者說話應(yīng)更謹慎些。

　　10. The recipe for their drink is a closely guarded trade secret.

　　他們飲料的配方是嚴格保守的商業(yè)秘密。

　　11. When they exchanged ideas, their talk was too guarded.

　　在他們交換意見時, 說話都很謹慎.

　　12. Two fierce griffins guarded the entrance to the castle.

　　在城堡的進門處,守著兩個兇猛的怪物.

　　13. The soldiers guarded the prince whenever he left the palace.

　　每當王子離開皇宮,士兵們都要保護他.

　　14. We were guarded by sentries against surprise attack.

　　我們由哨兵守衛(wèi),以免遭受突襲.

　　15. The player was guarded closely by her opponent.

　　那名運動員被她的對手緊緊地看住.