what （）this(动词)只能选be meet spell thank

动词变单三is-（ ） am-( ) meet-( ) look-( ) excuse-( )thank-( ) do- what is this?thank! meet look excuse thank do spell call lost found know take br 单词改第三人称单数形式怎么改?meet spell call thank What()this in English?()里用动词be怎么填 What()this?的()里用动词be怎么填 用be动词填空：What ___ you ___ this morning? 英语的选词填空单词：get,be,take,watch,have,thank,think,meet,buy,studyT let后面如果是第三人称,那动词要不要加s 例如Let Tom ----- （spell）this word for y have 后面只能跟be动词么 spell you name please what is this in english -this is a key What()this?A bus?的()里用动词be怎么填